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to 70&#37; of cases&#41;&#46; Cutaneous lesions are also the most quickly noticed and easiest biopsied&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">GVHD contributes in great measure to the morbidity and mortality associated with allogeneic HSCT&#46; If the blood tumors that motivated HSCT recur&#44; the most frequent cause of death is this complication&#44; which continues to be the main obstacle to more widespread use of a cell replacement procedure that offers the only curative treatment for a variety of diseases of the blood and other organs&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a></p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Pathophysiology and Classification</span><p id="par0015" class="elsevierStylePara elsevierViewall">GVHD develops when the donor&#39;s immune cells recognize the recipient&#39;s tissues as foreign as a result of interaction between the recipient&#39;s antigen-presenting cells and the donor&#39;s mature T-cells&#44;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a> leading to immune dysregulation that triggers inflammation and the destruction of the recipient&#39;s cells&#46; This alloimmune and autoimmune disorder results in an immunodeficient state that affects both quality of life and survival&#46;<a class="elsevierStyleCrossRefs" href="#bib0310"><span class="elsevierStyleSup">2&#44;3</span></a> Although the phenomenon of GVHD has negative consequences for the patient&#44; there is also a beneficial effect for patients with blood tumors given that primary tumor cells are targeted as well as healthy tissues &#40;the concept of antitumor vigilance&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">4</span></a> For this reason&#44; when treating GVHD a balance is sought&#46; The goal is to control the phenomenon but not abolish it completely so that the potent antitumor effect is preserved&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">GVHD is classified as either acute or chronic&#44; traditionally distinguished by a cutoff of 100 days after HSCT&#46; Today&#44; however&#44; they are defined by pathophysiological mechanisms and clinical presentation<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a> &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; The inflammatory changes that predominate in the initial phases are mainly due to a reaction to the graft&#46; Autoimmune reactions and immunodeficiency develop in later phases&#44; and over time the reparative process leads to fibrotic tissue damage &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Although inflammation and repair are dynamic and overlapping processes&#44; patients do not necessarily present signs of both and they are not explained by the same pathophysiological mechanisms&#46; Therefore&#44; the 2 processes are studied separately&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0025" class="elsevierStylePara elsevierViewall">Acute GVHD is described by a 3-phase model consisting of 1&#41; a conditioning regimen involving damage to keratinocytes in a proinflammatory environment&#44; 2&#41; induction of antigens against the donor&#39;s T cells by the host&#39;s dendritic cells&#44; followed by activation of the donor-derived T cells&#44; and 3&#41; activation of a type-1 helper T cell &#40;T<span class="elsevierStyleSmallCaps">h</span>1&#41; response that leads to necrosis of keratinocytes&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">The pathophysiology of chronic GVHD involves both allogeneic and autoimmune reactions&#46; Once the thymus is damaged in the conditioning regime and&#47;or by acute GVHD&#44; the organism&#39;s tolerance of its own cells is impaired&#46; In the complex response that develops&#44; CD4<span class="elsevierStyleSup">&#43;</span> and CD8<span class="elsevierStyleSup">&#43;</span> T cells&#44; regulatory T cells&#44; and B cells participate in producing autoantibodies&#46; T<span class="elsevierStyleSmallCaps">h</span>1&#44; T<span class="elsevierStyleSmallCaps">h</span>2 and T<span class="elsevierStyleSmallCaps">h</span>17 responses produce proinflammatory cytokines that cause fibrosis and organ failure&#46;<a class="elsevierStyleCrossRefs" href="#bib0335"><span class="elsevierStyleSup">7&#8211;9</span></a> High rates of elevated autoantibody titers &#40;of antinuclear antibodies&#44; antibodies to double-stranded DNA&#44; and anti-smooth muscle antibodies&#41; have been observed in patients with chronic GVHD&#44; and although this finding is unrelated to specific organ involvement&#44; it has been associated with higher risk for extensive&#44; sclerotic chronic GVHD in some studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0350"><span class="elsevierStyleSup">10&#8211;12</span></a></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Acute Graft-vs-Host Disease</span><p id="par0035" class="elsevierStylePara elsevierViewall">The patient&#39;s environment must be studied during the first stage after HSCT to guide diagnosis and treatment&#46; In the 100 days after a transplant&#44; the patient undergoes intense&#44; induced immunosuppression&#46; The immune system is gradually reconstituted in a process regulated by various hematopoietic cell series once the graft takes root&#46; The patient is also given multiple myeloablative&#44; immunosuppressant&#44; and antiinfective agents&#46; Infectious complications and drug-related adverse reactions are frequent&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The most important risk factors for acute GVHD are HLA disparity&#44; advanced donor or recipient age&#44; donor alloimmunization &#40;prior transfusions&#44; pregnancy&#41;&#44; use of peripheral blood as the source of progenitor hematopoietic cells&#44; and the number of T cells in the graft&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Symptoms&#44; Staging&#44; and Classification</span><p id="par0045" class="elsevierStylePara elsevierViewall">Although GVHD is a multisystem disease&#44; the skin and mucosal tissues are the most commonly affected organs&#46; Cutaneous signs and symptoms typically develop early&#59; therefore&#44; they often hold the key to diagnosis&#46; Liver and intestinal involvement is the second most common source of signs&#46; Thus&#44; skin rash&#44; elevated bilirubin levels&#44; and diarrhea form the characteristic clinical triad&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">13</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Skin symptoms may present as the dysesthesia&#44; itching&#44; erythema&#44; or edema that develop into a progressive morbilliform or generalized folliculotropic rash that is found mainly on the trunk&#44; spreads centrifugally&#44; and becomes confluent&#46; A rash on the palms&#44; soles and skin behind the ear is typical &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46; In severe eruptions&#44; blisters &#40;dermal-epidermal detachment&#41; may form&#46; Also typical is oral&#44; genital&#44; nasal&#44; or ocular mucositis&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">GVHD is staged &#40;0 to 4&#41; according to signs and symptoms and the percentage of body surface area &#40;BSA&#41; involved&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">13</span></a> Liver involvement is also staged from 0 to 4 according to blood and intestinal bilirubin levels and the severity of diarrhea&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Acute GVHD is considered classic if onset occurs within 100 days of HSCT&#44; persistent if it lasts beyond 100 days&#44; recurrent if it resolves but reappears after 100 days&#44; and late-onset if symptoms start after 100 days &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Diagnosis and Differential Diagnosis</span><p id="par0065" class="elsevierStylePara elsevierViewall">The diagnosis of acute GVHD is based on clinical evidence of the characteristic triad &#40;skin rash&#44; elevated bilirubin levels&#44; and diarrhea&#41;&#44; although all organs are not necessarily involved&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">In the early phase following HSCT&#44; other common complications that also present with rash must be considered&#46; Adverse drug reactions affecting the skin and infectious rashes &#40;often viral&#41; must be included in the differential diagnosis&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">14</span></a> Palmar-plantar erythrodysesthesia&#44; syringometaplasia&#44; and toxic epidermal necrolysis are relatively common toxic drug reactions in these patients and must be distinguished from GVHD&#46; When viral rashes develop after HSCT&#44; the usual culprits are reactivated cytomegalovirus&#44; Epstein-Barr virus&#44; herpes simplex virus types 1 and 2&#44; varicella zoster virus&#44; and human herpesvirus types 6&#44; 7 and 8&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">The diagnosing physician should bear in mind the clinical context and timing of lesion appearance&#44; drugs taken and other systemic manifestations&#46; Nevertheless&#44; differentiating these processes is often dauntingly difficult&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Histopathology and Pathologic Staging</span><p id="par0080" class="elsevierStylePara elsevierViewall">Histopathologic evaluation of a skin biopsy can aid the diagnosis of acute GVHD&#44; but there is no specific finding that confirms the diagnosis&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">15</span></a> It is helpful to include hair follicles in the biopsy&#46; Characteristic findings are vacuolar interface dermatitis with necrotic keratinocytes surrounded by lymphocytes &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46; When the condition is advanced&#44; dermal-epidermal detachment and subepidermal blisters can be seen&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">Histopathologic observations are graded from 0 to 4 &#40;similarly to clinical signs&#41; according to the degree of dermal-epidermal involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">16</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">The same obstacles are encountered in histologic diagnosis as in clinical diagnosis&#58; essentially acute GVHD must be distinguished from toxic drug reactions and infectious rashes&#46; Certain histopathologic features can be helpful&#46; Whether or not eosinophil counts are useful for differential diagnosis is controversial&#46;<a class="elsevierStyleCrossRefs" href="#bib0375"><span class="elsevierStyleSup">15&#44;17</span></a> A finding of adnexal involvement would favor a diagnosis of GVHD&#44; whereas the presence of spongiosis&#44; a dense inflammatory infiltrate&#44; and extravasation of blood would point to a drug reaction&#46; Enzyme-linked immunosorbent assay findings have demonstrated elafin overexpression throughout the epidermis&#44;<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">18</span></a> and this biomarker might therefore prove useful for the differential diagnosis of drug reactions&#44; in which only the granular layer would stain&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Chronic GVHD</span><p id="par0095" class="elsevierStylePara elsevierViewall">The onset of chronic GVHD occurs once the first phase &#40;the 100 days after HSCT&#41; is over&#46; The mean lag period is between 4 and 6 months&#46;<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">19</span></a> In the later phase&#44; immunosuppression is less marked but still present as a result of both immunosuppressants and the effects of HSCT itself&#46; Patients are also being exposed to several drugs&#44; whose side effects may appear immediately or with the passing of time&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">The risk factors for developing chronic GVHD are as follows&#58; earlier acute GVHD&#44; advanced donor or recipient age&#44; a female recipient of a graft from a male donor&#44; an unrelated donor or HLA disparity&#44; use of progenitor hematopoietic cells derived from peripheral blood &#40;which confer greater risk than cells from bone marrow&#44; which in turn confer greater risk than cells from umbilical cord blood&#41;&#44; a diagnosis of chronic myeloid leukemia&#44; and infusion of white blood cells from the donor&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">Factors related to poor prognosis are as follows&#58; progressive onset&#44; involvement of more than 50&#37; of the BSA at diagnosis&#44; thrombocytopenia &#40;platelet count<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>100 000 cells&#47;&#956;L&#41;&#44; lung involvement &#40;bronchiolitis&#41;&#44; and multiple organ involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">20</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">It is important to mention that strategies for lowering the incidence of acute GVHD have not affected the incidence of the chronic form&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">21</span></a></p><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Symptoms&#44; Staging&#44; and Classification</span><p id="par0115" class="elsevierStylePara elsevierViewall">Chronic GVHD can appear as an extension of acute GVHD &#40;the progressive chronic form&#41;&#44; or it can follow a disease-free period &#40;the quiescent form&#41; or develop without prior GVHD signs &#40;the de novo form&#41;<span class="elsevierStyleItalic">&#46;</span><a class="elsevierStyleCrossRefs" href="#bib0310"><span class="elsevierStyleSup">2&#44;3</span></a></p><p id="par0120" class="elsevierStylePara elsevierViewall">The classic presentation &#40;with the distinctive signs and symptoms of chronic GVHD but with no limits on timing&#41; is distinguished from overlap syndrome &#40;where acute and chronic signs and symptoms are both present&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p><p id="par0125" class="elsevierStylePara elsevierViewall">Chronic GVHD is a multisystem disease that can affect any organ&#44; either one or several at a time&#46; The involvement of the skin and oral mucosa is most common&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">22</span></a> Other affected organs in decreasing order of frequency are the liver&#44; the eyes &#40;dry-eye syndrome&#41;&#44; the intestines&#44; and the lungs&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Cutaneous signs and symptoms affecting skin&#44; mucosal tissue&#44; or adnexa can vary greatly&#46; Sclerodermiform and nonsclerodermiform manifestations are distinguished&#46;<a class="elsevierStyleCrossRefs" href="#bib0415"><span class="elsevierStyleSup">23&#44;24</span></a> The first type comprises &#40;from superficial to deeper signs&#41; lichen sclerosus et atrophicus&#44; morphea&#44; and fasciitis&#46; The second includes lichen planus&#44; poikiloderma&#44; and keratosis pilaris&#46; Other less common clinical presentations are panniculitis&#44; changes in pigmentation and sweating&#44; erythema&#44; rash&#44; pruritus&#44; ulceration&#44; vitiligo and alopecia areata&#44; among others<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">25</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46; Lichenoid lesions tend to appear earlier and may evolve into sclerotic lesions&#44; although not all such lesions have a lichenoid derivation&#44; nor do all lichenoids evolve in this way&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">14</span></a> It is not unusual for lesions to appear on skin previously damaged by burns&#44; radiotherapy&#44; or herpes infection &#40;isotopic response&#41; or where there has been repeated trauma &#40;isomorphic response&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0135" class="elsevierStylePara elsevierViewall">Although nail involvement is of relatively little importance&#44; it affects half of patients with chronic GVHD&#46; Manifestations might take the form of nail dystrophy&#44; thickening&#44; thinning onycholysis&#44; vertical striae&#44; or pterygium&#46; Similarly&#44; the scalp is often involved&#44; through alopecia &#40;scarring or nonscarring&#41;&#44; although the root causes are usually multiple &#40;e&#46;g&#46;&#44; chemotherapy&#44; radiotherapy&#44; hormone changes&#44; deficits&#44; GVHD&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall">Oral mucosa may be affected by oral lichen planus&#44; hyperkeratosis&#44; sclerosis&#44; xerostomia&#44; mucocele&#44; mucosal atrophy&#44; pseudomembranes&#44; and ulcers&#44; among other conditions<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">Genital mucosal involvement is less common and the patient does not usually ask about it spontaneously&#46; Direct questioning and a complete physical examination is therefore required to rule out this manifestation&#44; which is often an obstacle for sexual relations&#46; Genital lichen planus&#44; vaginal stenosis&#44; erosions&#44; fissures&#44; or ulcers may be present&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0150" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> lists the cutaneous and mucosal signs and symptoms of chronic cutaneous GVHD&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0155" class="elsevierStylePara elsevierViewall">Chronic GVHD is graded in order to indicate severity and evaluate response to treatment&#46; Grading systems are available for specific organs or to evaluate GVHD globally according to type and number of organs involved and severity&#46; The most widely used system in clinical practice&#44; because assessment is rapid and simple&#44; is that of the US National Institutes of Health &#40;NIH&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0430"><span class="elsevierStyleSup">26&#8211;28</span></a> A severity level of 0 to 3 assigned for each affected organ takes into consideration the impact on function&#46; <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> shows the NIH grading system for the skin and oral and genital mucosa&#46; Other more complex scales are available for use in clinical trials&#44; although comparative studies have not demonstrated they are superior to the NIH&#39;s for determining disease activity&#44; the physician and patient&#39;s perception&#44; or relation to survival&#46;<a class="elsevierStyleCrossRefs" href="#bib0445"><span class="elsevierStyleSup">29&#44;30</span></a></p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Diagnosis and Differential Diagnosis</span><p id="par0160" class="elsevierStylePara elsevierViewall">The signs and symptoms of chronic GVHD are classified by type as follows<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a>&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">-</span><p id="par0165" class="elsevierStylePara elsevierViewall">Diagnostic&#58; sufficient to establish a diagnosis of chronic GVHD without resort to other tests</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">-</span><p id="par0170" class="elsevierStylePara elsevierViewall">Distinctive&#58; insufficient alone for establishing a firm diagnosis without complementary tests or evidence of lesions on other organs</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">-</span><p id="par0175" class="elsevierStylePara elsevierViewall">Other features&#44; or unclassified ones&#58; also insufficient for establishing a diagnosis</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">-</span><p id="par0180" class="elsevierStylePara elsevierViewall">Common features&#58; seen in both chronic and acute GVHD</p></li></ul></p><p id="par0185" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> summarizes skin and mucosal signs and symptoms according to these categories&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">A diagnosis of chronic GVHD requires the following findings<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a>&#58;<ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">-</span><p id="par0195" class="elsevierStylePara elsevierViewall">The presence of at least 1 diagnostic sign or symptom&#44; or the presence of at least 1 distinctive sign or symptom plus histologic confirmation</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">-</span><p id="par0200" class="elsevierStylePara elsevierViewall">The exclusion of other possible diagnoses</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">-</span><p id="par0205" class="elsevierStylePara elsevierViewall">Differential diagnosis with acute GVHD</p></li></ul></p><p id="par0210" class="elsevierStylePara elsevierViewall">It is important to remember that not all skin lesions in patients who have undergone HSCT are signs of GVHD&#46; Like other patients&#44; graft recipients can also develop drug reactions&#44; inflammatory lesions&#44; infections&#44; benign or malignant tumors&#44; or other conditions&#46; Therefore&#44; the physician must consider the correlation of clinical and pathologic features and timing when diagnosing any skin lesion&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Histopathology and Pathologic Staging</span><p id="par0215" class="elsevierStylePara elsevierViewall">A skin biopsy is recommended to confirm diagnosis&#44; although it is not absolutely necessary if the patient has a sign or symptom considered diagnostic&#46; Biopsies are suggestive but not specific for either chronic or acute GVHD&#44; although a histologic report that findings are &#8220;compatible with&#8221; or &#8220;diagnostic for&#8221; GVHD is sufficient to confirm the diagnosis if the patient has manifestations classified as distinctive&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a> The minimum histologic criteria that must be met for diagnosis are the presence of apoptosis in the basement membrane of the epidermis or the external root sheath of a hair follicle or the acrosyringium&#46; These findings may be accompanied by a lichenoid infiltrate&#44; vacuolar changes or lymphocytes surrounding necrotic keratinocytes &#40;lymphocyte satellitosis&#41;&#46; There are additional specific criteria according to type of chronic GVHD<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">32</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Treatment</span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Prophylaxis and Life Support</span><p id="par0220" class="elsevierStylePara elsevierViewall">Following HSCT&#44; all patients should keep skin well hydrated&#44; undertake moderate exercise&#44; and avoid sun exposure by using sun blockers and sun glasses&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">Dry mouth and genitalia are very common symptoms of GVHD and can be alleviated through topical and oral medications<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">33</span></a>&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">-</span><p id="par0230" class="elsevierStylePara elsevierViewall">Dry mouth syndrome&#58; artificial saliva and oral pilocarpine &#40;5<span class="elsevierStyleHsp" style=""></span>mg every 6&#8211;8<span class="elsevierStyleHsp" style=""></span>h&#41;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">34</span></a></p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">-</span><p id="par0235" class="elsevierStylePara elsevierViewall">Dry genitals&#58; humectants and hormonal therapy&#46;</p></li></ul></p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Acute GVHD</span><p id="par0240" class="elsevierStylePara elsevierViewall">Given that acute GVHD is a multisystem disease that appears in immunocompromised patients&#44; and customarily presents during hospitalization for HSCT&#44; the treating physician is usually a hematologist&#46; The first line of therapy is methylprednisolone&#44; and if there is no response&#44; a second drug &#40;e&#46;g&#46;&#44; antithymocyte globulin&#44; mycophenolate mofetil&#44; anti-tumor necrosis factor agents&#44; or sirolimus&#41; can be added&#44; using departmental regimens and a tailored approach&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">35</span></a> However&#44; the main approach to acute GVHD is to prevent it&#44; through the use of corticosteroids&#44; ciclosporin&#44; and&#47;or methotrexate&#46;<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">36</span></a></p><p id="par0245" class="elsevierStylePara elsevierViewall">Topical treatments for skin manifestations of GVHD are inadequate&#46; Phototherapy may be useful in cases that are resistant to conventional treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib0485"><span class="elsevierStyleSup">37&#8211;42</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Chronic GVHD</span><p id="par0250" class="elsevierStylePara elsevierViewall">Dermatologists play a more important role in managing and treating chronic GVHD&#46; Certain issues must be considered before choosing an approach&#46; Once again&#44; we should recall the multisystem nature of the disease and always investigate the involvement of other organs&#46; It is also important to distinguish sclerodermiform and nonsclerodermiform types&#44; verify depth &#40;epidermal&#44; dermal&#44; or subcutaneous involvement&#41;&#44; note the extension of manifestations &#40;localized vs generalized&#41;&#44; and consider location when evaluating cutaneous signs&#46; Manifestations involving more than 50&#37; of the BSA predict a poor prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">43</span></a></p><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Topical Treatments</span><p id="par0255" class="elsevierStylePara elsevierViewall">When skin manifestations are localized&#44; epidermal&#44; or dermal&#44; topical preparations can be used&#46; Corticosteroids<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">33</span></a> and tacrolimus<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">44&#44;45</span></a> can be useful&#59; the second is particularly appropriate for the face and skin folds and as a way to reduce corticosteroid use&#46; Topical medications can also be used on the oral and genital mucosa&#46;<a class="elsevierStyleCrossRefs" href="#bib0530"><span class="elsevierStyleSup">46&#44;47</span></a> Different corticosteroids are prescribed according to their potency at the affected site and lesion depth&#46;</p><p id="par0260" class="elsevierStylePara elsevierViewall">Formulations that are useful inside the mouth are 0&#46;1&#37; triamcinolone acetonide &#40;mouthwash or oral adhesive gel&#41;&#44; 0&#46;05&#37; clobetasol &#40;oral adhesive gel&#41;&#44; and 0&#46;1&#37; tacrolimus &#40;ointment&#41;&#59; a ciclosporin mouthwash can be useful in patients on long-term corticosteroids&#46;<a class="elsevierStyleCrossRef" href="#bib0540"><span class="elsevierStyleSup">48</span></a></p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Systemic Treatments</span><p id="par0265" class="elsevierStylePara elsevierViewall">Systemic therapy should be considered whenever topical treatments targeting the skin have failed &#40;i&#46;e&#46;&#44; signs or symptoms do not improve or become worse&#41;&#44; multiple organs or a high percentage of the BSA is involved&#44; or cutaneous or fascial sclerosis has been demonstrated&#46;<a class="elsevierStyleCrossRefs" href="#bib0415"><span class="elsevierStyleSup">23&#44;31</span></a> The patient&#39;s concomitant conditions&#44; general state of health&#44; disease phase&#44; and risk of infection must be factored into the decision&#46;</p><p id="par0270" class="elsevierStylePara elsevierViewall">Oral prednisone at a dose of 1<span class="elsevierStyleHsp" style=""></span>mg&#47;kg is the first line of treatment&#46; There is no standardized rescue treatment if prednisone fails&#46; The choice of alternatives should be individualized according to clinical manifestations of GVHD and other patient-related factors&#46; Sirolimus&#44; mycophenolate mofetil&#44; rituximab&#44; imatinib&#44; azathioprine&#44; thalidomide&#44; methotrexate&#44; and others can be used&#46; Of all these alternatives&#44; imatinib mesylate at a dose of 100 to 200<span class="elsevierStyleHsp" style=""></span>mg&#47;d is the most specific for sclerodermiform cutaneous GVHD&#46;<a class="elsevierStyleCrossRefs" href="#bib0545"><span class="elsevierStyleSup">49&#8211;51</span></a> In all cases in which systemic treatment is being considered&#44; the hematologist and other specialists treating the patient should be consulted and consensus sought&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Physical Therapies</span><p id="par0275" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">1&#46;</span><p id="par0280" class="elsevierStylePara elsevierViewall">Phototherapy&#46; Psoralen plus UV-A &#40;PUVA&#41;&#44; UV-A1&#44; UV-B&#44; and narrow-band UV-B phototherapies have been used&#46;<a class="elsevierStyleCrossRef" href="#bib0560"><span class="elsevierStyleSup">52</span></a> These alternative therapies can be useful for patients with generalized lesions that are refractory to other measures&#44; or they can be used as a corticoid-sparing strategy&#46;<a class="elsevierStyleCrossRef" href="#bib0565"><span class="elsevierStyleSup">53</span></a> The choice of type of phototherapy is based mainly on the depth of lesions and the patient&#39;s concomitant conditions&#46; Sclerotic lesions respond best to PUVA&#44; whereas superficial lesions respond to narrow-band UV-B treatment&#46; A finding of ocular GVHD would contraindicate PUVA&#46; The dermatologist should take care to investigate any photsensitizing drugs &#40;especially voriconazole&#41; the patient might be taking as well as a positive antinuclear antibody test result&#46;<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">54</span></a></p></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">2&#46;</span><p id="par0285" class="elsevierStylePara elsevierViewall">Extracorporeal photopheresis&#46; This therapy is particularly appropriate for cutaneomucosal forms of GVHD and patients who have become dependent on corticosteroids or have hepatic or pulmonary involvement&#46;<a class="elsevierStyleCrossRefs" href="#bib0575"><span class="elsevierStyleSup">55&#44;56</span></a> The technique requires placement of a central venous catheter for apheresis of white blood cells and platelets from whole blood&#46; After treatment with PUVA&#44; the concentrated collected blood is reinfused&#46; The procedure&#44; which is repeated twice a week for several months&#44; is time-consuming&#46; Although few side effects develop during treatment&#44; risk of infection and sepsis is present&#46;</p></li></ul></p><p id="par0290" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a> shows a flow chart of available treatments for chronic cutaneous GVHD&#46;</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia></span></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Measuring Therapeutic Response</span><p id="par0295" class="elsevierStylePara elsevierViewall">No validated&#44; standardized criteria are available for measuring response to therapy for chronic cutaneous GVHD&#46; This situation complicates the management of this condition and the design of clinical trials&#46;</p><p id="par0300" class="elsevierStylePara elsevierViewall">Disease activity must be measured at 2 time points in order to quantify and compare response&#46; It is important to assess skin lesions&#44; depth of involvement &#40;epidermis&#44; dermis&#44; or subcutaneous tissue&#41;&#44; and BSA expressed as a percentage&#46;</p><p id="par0305" class="elsevierStylePara elsevierViewall">Definitions for complete response &#40;all lesions have disappeared&#41;&#44; partial response &#40;only improvement can be perceived&#41;&#44; and progression &#40;the condition has worsened&#41; have been proposed&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a> However&#44; the definitions are subjective and reproducibility is a problem&#46; Furthermore&#44; clinical manifestations are varied &#40;dry mouth&#44; sclerotic cutaneous lesions&#44; etc&#46;&#41; and the fact that some are irreversible makes it difficult to standardize response criteria&#46;</p></span></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Outlook for the Future</span><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Acute GVHD</span><p id="par0310" class="elsevierStylePara elsevierViewall">Acute GVHD continues to represent the main limiting factor affecting the use of allogeneic HSCT&#46; Biomarkers for early risk assessment and diagnosis are needed&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">57</span></a> The treatment of acute GVHD is less than optimal&#44; and we need new approaches to prevention and management that preserve the antitumor effects of the graft&#46;</p></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Chronic GVHD</span><p id="par0315" class="elsevierStylePara elsevierViewall">The pathogenesis of chronic GVHD is still poorly understood&#46; Interest in the role of cytokines in the development of clinical signs and their influence on severity has increased given that greater understanding might suggest potential therapeutic targets&#46;<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">58</span></a></p><p id="par0320" class="elsevierStylePara elsevierViewall">Assessing response to chronic GVHD therapy is one of the greatest challenges we face&#46; Available grading systems are unable to assess disease extension and severity or measure the effect of treatment&#46; There are no clinical or laboratory findings that can distinguish active chronic GVHD from residual fibrosis&#46;</p><p id="par0325" class="elsevierStylePara elsevierViewall">Nor is there a laboratory test for a biomarker that can predict risk of developing chronic GVHD&#44; response to treatment&#44; or survival&#46; Such biomarkers are essential for identifying risk and initiating treatment early as well as for closely monitoring response&#46; They can also be helpful for measuring disease activity and the balance between chronic GVHD and the antileukemia effect of the graft&#46; Biomarkers are currently being developed and their use validated&#44; but none have been applied routinely in clinical practice&#46;<a class="elsevierStyleCrossRefs" href="#bib0595"><span class="elsevierStyleSup">59&#44;60</span></a></p></span></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Conclusions</span><p id="par0330" class="elsevierStylePara elsevierViewall">GVHD is a multisystem disease that can affect any organ and should therefore be managed through a multidisciplinary approach&#46;</p><p id="par0335" class="elsevierStylePara elsevierViewall">Improving our understanding of GVHD and validating biomarkers of disease activity can help us maximize the therapeutic potential of HSCT and minimize the risk of GVHD&#46;</p></span><span id="sec0115" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Conflicts of Interest</span><p id="par0340" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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            0 => "Enfermedad injerto contra hu&#233;sped cut&#225;nea"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Graft-vs-host disease &#40;GVHD&#41; is a multisystem disease that arises as a complication of allogeneic hematopoietic stem cell transplant&#46; It is due to recognition of the recipient&#39;s tissues by immune cells from the donor&#46; The skin and mucous membranes are the organs most commonly affected&#46; GVHD is classified as acute or chronic depending on the pathophysiology and clinical presentation&#46; Acute GVHD typically presents with the triad of rash&#44; diarrhea&#44; and hyperbilirubinemia&#44; and treatment is based on systemic corticosteroid and immunosuppressant therapy&#46; The cutaneous manifestations of chronic GVHD are divided into sclerodermiform and nonsclerodermiform&#44; and the mucous membranes and skin appendages may also be affected&#46; The diagnosis is mainly clinical&#44; but skin biopsy can help in doubtful cases&#46; Treatment can be topical&#44; systemic&#44; or physical&#44; depending on the size&#44; site&#44; and depth of the lesions and the involvement of other organs&#46;</p></span>"
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        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">La enfermedad injerto contra hu&#233;sped &#40;EICH&#41; es una enfermedad multisist&#233;mica que aparece como complicaci&#243;n de un trasplante de progenitores hematopoy&#233;ticos alog&#233;nico&#46; Se basa en el reconocimiento de tejidos del receptor por parte de la inmunidad heredada del donante&#46; La piel y las mucosas son los &#243;rganos m&#225;s frecuentemente afectados&#46; Se clasifica en aguda y cr&#243;nica&#44; en funci&#243;n de su fisiopatolog&#237;a y presentaci&#243;n cl&#237;nica&#46; La forma aguda se manifiesta t&#237;picamente con la tr&#237;ada de exantema&#44; diarrea e hiperbilirrubinemia&#44; y el tratamiento se basa en el uso de corticoides e inmunosupresores sist&#233;micos&#46; Las manifestaciones cut&#225;neas de la forma cr&#243;nica se dividen en esclerodermiformes y no esclerodermiformes&#46; Puede afectar tambi&#233;n a mucosas y faneras&#46; El diagn&#243;stico es fundamentalmente cl&#237;nico&#44; aunque en casos dudosos la biopsia cut&#225;nea puede ayudar a confirmarlo&#46; El tratamiento puede ser t&#243;pico&#44; sist&#233;mico o f&#237;sico&#44; en funci&#243;n de la extensi&#243;n&#44; localizaci&#243;n&#44; profundidad de las lesiones y afectaci&#243;n de otros &#243;rganos&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0015">Please cite this article as&#58; Ballester-S&#225;nchez R&#44; Navarro-Mira M&#44; Sanz-Caballer J&#44; Botella-Estrada R&#46; Aproximaci&#243;n a la enfermedad injerto contra hu&#233;sped cut&#225;nea&#46; Actas Dermosifiliogr&#46; 2016&#59;107&#58;183&#8211;193&#46;</p>"
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Schematic depiction of the courses of acute and chronic GVHD&#46; GVHD refers to graft-vs-host disease&#59; GI&#44; gastrointestinal&#46; Adapted from <span class="elsevierStyleInterRef" id="intr0005" href="http://ccr.cancer.gov/resources/gvhd/about.asp">http&#58;&#47;&#47;ccr&#46;cancer&#46;gov&#47;resources&#47;gvhd&#47;about&#46;asp</span>&#46;</p>"
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          "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Signs and symptoms of acute graft-vs-host disease&#46; A&#44; Confluent&#44; foliculotropic macular rash on the trunk&#46; B&#44; Eruption behind the ear&#46; C&#44; Close view of the rash&#46; D&#44; Palmar involvement&#46;</p>"
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          "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Histopathology of cutaneous GVHD&#46;</p> <p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">A and B&#44; Acute GVHD&#46; Hematoxylin and eosin &#40;H&#38;E&#41;&#44; original magnification &#215;<span class="elsevierStyleHsp" style=""></span>200 and H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>400&#44; respectively&#46; Interface dermatitis with necrotic keratinocytes surrounded by lymphocytes &#40;lymphocyte satellitosis&#41;&#46; C and D&#44; Chronic GVHD&#46; H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>100 and H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>200&#46; Interface dermatitis with dermal-epidermal detachment and follicular involvement&#46;</p>"
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          "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Signs of chronic cutaneous and mucosal graft-vs-host disease&#46;</p> <p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">A&#44; Poikiloderma&#46; B&#44; Nongenital lichen sclerosus et atrophicus&#46; C&#44; Lichenoid eruption&#46; D&#44; Morphea&#46; E&#44; Fasciitis&#46; F&#44; Keratosis pilaris&#46; G&#44; Oral lichen planus&#46; H&#44; Oral erosion and ulcers&#46; I&#44; Hyperkeratosis and fissures&#46;</p>"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Flow chart for treatment of chronic cutaneous GVHD&#46;</p> <p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">GVHD refers to graft-vs-host disease&#59; CT&#44; clinical trial&#59; PUVA&#44; psoralen plus UV-A&#59; NB-UV-B&#44; narrow-band UV-B&#46;</p> <p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Adapted from Hymes et al&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p>"
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          "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Adapted from Filopovich et al&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Abbreviations&#58; GVHD&#44; graft-vs-host disease&#59; HSCT&#44; hematopoietic stem cell transplant</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Types&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Time Elapsed Since HSCT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Signs and Symptoms of Acute GVHD<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Signs and Symptoms of Chronic GVHD<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">b</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleBold">Acute GVHD</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Classic</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#8804;<span class="elsevierStyleHsp" style=""></span>100 d&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Persistent&#44; recurrent&#44; or late-onset</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#62;<span class="elsevierStyleHsp" style=""></span>100 d&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleBold">Chronic GVHD</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Classic</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No time limits&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Lichenoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Earlier&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Sclerodermoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Later&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Overlap syndrome</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Maculopapular rash&#44; diarrhea&#44; or cholestatic hepatitis</p>"
            ]
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              "identificador" => "tblfn0010"
              "etiqueta" => "b"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Multiple organs &#40;fibrosis&#41;&#46;</p>"
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          ]
        ]
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          "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">GVHD Classification&#46;</p>"
        ]
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        "identificador" => "tbl0010"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
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        "tabla" => array:1 [
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Diagnostic Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Distinctive Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Other Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Features Common to Both Acute and Chronic GVHD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Skin</td><td class="td" title="table-entry  " align="left" valign="top">Poikiloderma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Depigmentation</td><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Changes in sweating</td><td class="td" title="table-entry  " align="left" valign="top">Erythema&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Lichen planus-like features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Maculopapular rash&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Sclerotic changes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pruritus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Morphea&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Lichen sclerosus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Mouth</td><td class="td" title="table-entry  " align="left" valign="top">Lichen planus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Xerostomia&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Gingivitis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Hyperkeratosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucoceles&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucositis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucosal atrophy&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Erythema&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pseudomembranes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pain&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Ulcers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Genitalia</td><td class="td" title="table-entry  " align="left" valign="top">Lichen planus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Erosions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Vaginal stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Fissures&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Ulcers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Nails</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Dystrophic nails&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Brittle nails&#44; striations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Onycholysis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pterygium&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Nail loss&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Scalp</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Alopecia&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Fine&#44; uneven or dull hair&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Papulosquamous lesions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Early graying&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Signs and Symptoms of Chronic GVHD&#46;</p>"
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          "leyenda" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Abbreviations&#58; BSA&#44; body surface area&#59; GVHD&#44; graft-vs-host disease&#59; NIH&#44; National Institutes of Health&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">Score</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Skin&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Mouth&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Genital tract&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " colspan="3" align="center" valign="top">No signs or symptoms</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on &#8804;<span class="elsevierStyleHsp" style=""></span>18&#37;<span class="elsevierStyleHsp" style=""></span>of the BSA&#44; without sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mild symptoms&#44; not significantly limiting oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mild symptoms with no impact on sexual function&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on 19&#37; to 50&#37; of the BSA&#44; with superficial sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Moderate symptoms with partial limitation of oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Moderate signs&#44; with discomfort on examination&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on &#8805;<span class="elsevierStyleHsp" style=""></span>50&#37; of the BSA<br>Deep sclerosis<br>Impaired mobility&#44; ulceration&#44; or severe itching&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Severe symptoms with major limitation of oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Advanced signs &#40;vaginal stenosis&#44; labial agglutination&#44; severe ulcers&#41; and severe pain during coitus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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Review
Review of Cutaneous Graft-vs-Host Disease
Aproximación a la enfermedad injerto contra huésped cutánea
R. Ballester-Sáncheza,
Autor para correspondencia
roseta999@hotmail.com

Corresponding author.
, M. Navarro-Miraa, J. Sanz-Caballerb, R. Botella-Estradaa
a Servicio de Dermatología, Hospital Universitario y Politécnico La Fe de Valencia, Valencia, Spain
b Servicio de Hematología y Hemoterapia, Hospital Universitario y Politécnico La Fe de Valencia, Valencia, Spain
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Graft-vs-host disease &#40;GVHD&#41; is a multisystem complication of allogeneic hematopoietic stem cell transplantation &#40;HSCT&#41;&#44; which is the only curative treatment for certain blood diseases&#46; HSCT replaces a patient&#39;s ineffective stem cells with a healthy donor&#39;s effective ones&#44; derived from bone marrow&#44; peripheral blood&#44; or umbilical cord blood&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a> In spite of measures to prevent HSCT from developing&#44; the incidence of this complication remains high&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a> Any organ can be affected&#44; but the skin and mucous membranes are most often involved &#40;in 20&#37; to 70&#37; of cases&#41;&#46; Cutaneous lesions are also the most quickly noticed and easiest biopsied&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">GVHD contributes in great measure to the morbidity and mortality associated with allogeneic HSCT&#46; If the blood tumors that motivated HSCT recur&#44; the most frequent cause of death is this complication&#44; which continues to be the main obstacle to more widespread use of a cell replacement procedure that offers the only curative treatment for a variety of diseases of the blood and other organs&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a></p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Pathophysiology and Classification</span><p id="par0015" class="elsevierStylePara elsevierViewall">GVHD develops when the donor&#39;s immune cells recognize the recipient&#39;s tissues as foreign as a result of interaction between the recipient&#39;s antigen-presenting cells and the donor&#39;s mature T-cells&#44;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">1</span></a> leading to immune dysregulation that triggers inflammation and the destruction of the recipient&#39;s cells&#46; This alloimmune and autoimmune disorder results in an immunodeficient state that affects both quality of life and survival&#46;<a class="elsevierStyleCrossRefs" href="#bib0310"><span class="elsevierStyleSup">2&#44;3</span></a> Although the phenomenon of GVHD has negative consequences for the patient&#44; there is also a beneficial effect for patients with blood tumors given that primary tumor cells are targeted as well as healthy tissues &#40;the concept of antitumor vigilance&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">4</span></a> For this reason&#44; when treating GVHD a balance is sought&#46; The goal is to control the phenomenon but not abolish it completely so that the potent antitumor effect is preserved&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">GVHD is classified as either acute or chronic&#44; traditionally distinguished by a cutoff of 100 days after HSCT&#46; Today&#44; however&#44; they are defined by pathophysiological mechanisms and clinical presentation<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a> &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46; The inflammatory changes that predominate in the initial phases are mainly due to a reaction to the graft&#46; Autoimmune reactions and immunodeficiency develop in later phases&#44; and over time the reparative process leads to fibrotic tissue damage &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Although inflammation and repair are dynamic and overlapping processes&#44; patients do not necessarily present signs of both and they are not explained by the same pathophysiological mechanisms&#46; Therefore&#44; the 2 processes are studied separately&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0025" class="elsevierStylePara elsevierViewall">Acute GVHD is described by a 3-phase model consisting of 1&#41; a conditioning regimen involving damage to keratinocytes in a proinflammatory environment&#44; 2&#41; induction of antigens against the donor&#39;s T cells by the host&#39;s dendritic cells&#44; followed by activation of the donor-derived T cells&#44; and 3&#41; activation of a type-1 helper T cell &#40;T<span class="elsevierStyleSmallCaps">h</span>1&#41; response that leads to necrosis of keratinocytes&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><p id="par0030" class="elsevierStylePara elsevierViewall">The pathophysiology of chronic GVHD involves both allogeneic and autoimmune reactions&#46; Once the thymus is damaged in the conditioning regime and&#47;or by acute GVHD&#44; the organism&#39;s tolerance of its own cells is impaired&#46; In the complex response that develops&#44; CD4<span class="elsevierStyleSup">&#43;</span> and CD8<span class="elsevierStyleSup">&#43;</span> T cells&#44; regulatory T cells&#44; and B cells participate in producing autoantibodies&#46; T<span class="elsevierStyleSmallCaps">h</span>1&#44; T<span class="elsevierStyleSmallCaps">h</span>2 and T<span class="elsevierStyleSmallCaps">h</span>17 responses produce proinflammatory cytokines that cause fibrosis and organ failure&#46;<a class="elsevierStyleCrossRefs" href="#bib0335"><span class="elsevierStyleSup">7&#8211;9</span></a> High rates of elevated autoantibody titers &#40;of antinuclear antibodies&#44; antibodies to double-stranded DNA&#44; and anti-smooth muscle antibodies&#41; have been observed in patients with chronic GVHD&#44; and although this finding is unrelated to specific organ involvement&#44; it has been associated with higher risk for extensive&#44; sclerotic chronic GVHD in some studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0350"><span class="elsevierStyleSup">10&#8211;12</span></a></p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Acute Graft-vs-Host Disease</span><p id="par0035" class="elsevierStylePara elsevierViewall">The patient&#39;s environment must be studied during the first stage after HSCT to guide diagnosis and treatment&#46; In the 100 days after a transplant&#44; the patient undergoes intense&#44; induced immunosuppression&#46; The immune system is gradually reconstituted in a process regulated by various hematopoietic cell series once the graft takes root&#46; The patient is also given multiple myeloablative&#44; immunosuppressant&#44; and antiinfective agents&#46; Infectious complications and drug-related adverse reactions are frequent&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The most important risk factors for acute GVHD are HLA disparity&#44; advanced donor or recipient age&#44; donor alloimmunization &#40;prior transfusions&#44; pregnancy&#41;&#44; use of peripheral blood as the source of progenitor hematopoietic cells&#44; and the number of T cells in the graft&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Symptoms&#44; Staging&#44; and Classification</span><p id="par0045" class="elsevierStylePara elsevierViewall">Although GVHD is a multisystem disease&#44; the skin and mucosal tissues are the most commonly affected organs&#46; Cutaneous signs and symptoms typically develop early&#59; therefore&#44; they often hold the key to diagnosis&#46; Liver and intestinal involvement is the second most common source of signs&#46; Thus&#44; skin rash&#44; elevated bilirubin levels&#44; and diarrhea form the characteristic clinical triad&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">13</span></a></p><p id="par0050" class="elsevierStylePara elsevierViewall">Skin symptoms may present as the dysesthesia&#44; itching&#44; erythema&#44; or edema that develop into a progressive morbilliform or generalized folliculotropic rash that is found mainly on the trunk&#44; spreads centrifugally&#44; and becomes confluent&#46; A rash on the palms&#44; soles and skin behind the ear is typical &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>&#41;&#46; In severe eruptions&#44; blisters &#40;dermal-epidermal detachment&#41; may form&#46; Also typical is oral&#44; genital&#44; nasal&#44; or ocular mucositis&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">GVHD is staged &#40;0 to 4&#41; according to signs and symptoms and the percentage of body surface area &#40;BSA&#41; involved&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">13</span></a> Liver involvement is also staged from 0 to 4 according to blood and intestinal bilirubin levels and the severity of diarrhea&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">Acute GVHD is considered classic if onset occurs within 100 days of HSCT&#44; persistent if it lasts beyond 100 days&#44; recurrent if it resolves but reappears after 100 days&#44; and late-onset if symptoms start after 100 days &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> and <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Diagnosis and Differential Diagnosis</span><p id="par0065" class="elsevierStylePara elsevierViewall">The diagnosis of acute GVHD is based on clinical evidence of the characteristic triad &#40;skin rash&#44; elevated bilirubin levels&#44; and diarrhea&#41;&#44; although all organs are not necessarily involved&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">In the early phase following HSCT&#44; other common complications that also present with rash must be considered&#46; Adverse drug reactions affecting the skin and infectious rashes &#40;often viral&#41; must be included in the differential diagnosis&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">14</span></a> Palmar-plantar erythrodysesthesia&#44; syringometaplasia&#44; and toxic epidermal necrolysis are relatively common toxic drug reactions in these patients and must be distinguished from GVHD&#46; When viral rashes develop after HSCT&#44; the usual culprits are reactivated cytomegalovirus&#44; Epstein-Barr virus&#44; herpes simplex virus types 1 and 2&#44; varicella zoster virus&#44; and human herpesvirus types 6&#44; 7 and 8&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">The diagnosing physician should bear in mind the clinical context and timing of lesion appearance&#44; drugs taken and other systemic manifestations&#46; Nevertheless&#44; differentiating these processes is often dauntingly difficult&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Histopathology and Pathologic Staging</span><p id="par0080" class="elsevierStylePara elsevierViewall">Histopathologic evaluation of a skin biopsy can aid the diagnosis of acute GVHD&#44; but there is no specific finding that confirms the diagnosis&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">15</span></a> It is helpful to include hair follicles in the biopsy&#46; Characteristic findings are vacuolar interface dermatitis with necrotic keratinocytes surrounded by lymphocytes &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46; When the condition is advanced&#44; dermal-epidermal detachment and subepidermal blisters can be seen&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0085" class="elsevierStylePara elsevierViewall">Histopathologic observations are graded from 0 to 4 &#40;similarly to clinical signs&#41; according to the degree of dermal-epidermal involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">16</span></a></p><p id="par0090" class="elsevierStylePara elsevierViewall">The same obstacles are encountered in histologic diagnosis as in clinical diagnosis&#58; essentially acute GVHD must be distinguished from toxic drug reactions and infectious rashes&#46; Certain histopathologic features can be helpful&#46; Whether or not eosinophil counts are useful for differential diagnosis is controversial&#46;<a class="elsevierStyleCrossRefs" href="#bib0375"><span class="elsevierStyleSup">15&#44;17</span></a> A finding of adnexal involvement would favor a diagnosis of GVHD&#44; whereas the presence of spongiosis&#44; a dense inflammatory infiltrate&#44; and extravasation of blood would point to a drug reaction&#46; Enzyme-linked immunosorbent assay findings have demonstrated elafin overexpression throughout the epidermis&#44;<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">18</span></a> and this biomarker might therefore prove useful for the differential diagnosis of drug reactions&#44; in which only the granular layer would stain&#46;</p></span></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Chronic GVHD</span><p id="par0095" class="elsevierStylePara elsevierViewall">The onset of chronic GVHD occurs once the first phase &#40;the 100 days after HSCT&#41; is over&#46; The mean lag period is between 4 and 6 months&#46;<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">19</span></a> In the later phase&#44; immunosuppression is less marked but still present as a result of both immunosuppressants and the effects of HSCT itself&#46; Patients are also being exposed to several drugs&#44; whose side effects may appear immediately or with the passing of time&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">The risk factors for developing chronic GVHD are as follows&#58; earlier acute GVHD&#44; advanced donor or recipient age&#44; a female recipient of a graft from a male donor&#44; an unrelated donor or HLA disparity&#44; use of progenitor hematopoietic cells derived from peripheral blood &#40;which confer greater risk than cells from bone marrow&#44; which in turn confer greater risk than cells from umbilical cord blood&#41;&#44; a diagnosis of chronic myeloid leukemia&#44; and infusion of white blood cells from the donor&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">6</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">Factors related to poor prognosis are as follows&#58; progressive onset&#44; involvement of more than 50&#37; of the BSA at diagnosis&#44; thrombocytopenia &#40;platelet count<span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>100 000 cells&#47;&#956;L&#41;&#44; lung involvement &#40;bronchiolitis&#41;&#44; and multiple organ involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">20</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">It is important to mention that strategies for lowering the incidence of acute GVHD have not affected the incidence of the chronic form&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">21</span></a></p><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Symptoms&#44; Staging&#44; and Classification</span><p id="par0115" class="elsevierStylePara elsevierViewall">Chronic GVHD can appear as an extension of acute GVHD &#40;the progressive chronic form&#41;&#44; or it can follow a disease-free period &#40;the quiescent form&#41; or develop without prior GVHD signs &#40;the de novo form&#41;<span class="elsevierStyleItalic">&#46;</span><a class="elsevierStyleCrossRefs" href="#bib0310"><span class="elsevierStyleSup">2&#44;3</span></a></p><p id="par0120" class="elsevierStylePara elsevierViewall">The classic presentation &#40;with the distinctive signs and symptoms of chronic GVHD but with no limits on timing&#41; is distinguished from overlap syndrome &#40;where acute and chronic signs and symptoms are both present&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p><p id="par0125" class="elsevierStylePara elsevierViewall">Chronic GVHD is a multisystem disease that can affect any organ&#44; either one or several at a time&#46; The involvement of the skin and oral mucosa is most common&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">22</span></a> Other affected organs in decreasing order of frequency are the liver&#44; the eyes &#40;dry-eye syndrome&#41;&#44; the intestines&#44; and the lungs&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">Cutaneous signs and symptoms affecting skin&#44; mucosal tissue&#44; or adnexa can vary greatly&#46; Sclerodermiform and nonsclerodermiform manifestations are distinguished&#46;<a class="elsevierStyleCrossRefs" href="#bib0415"><span class="elsevierStyleSup">23&#44;24</span></a> The first type comprises &#40;from superficial to deeper signs&#41; lichen sclerosus et atrophicus&#44; morphea&#44; and fasciitis&#46; The second includes lichen planus&#44; poikiloderma&#44; and keratosis pilaris&#46; Other less common clinical presentations are panniculitis&#44; changes in pigmentation and sweating&#44; erythema&#44; rash&#44; pruritus&#44; ulceration&#44; vitiligo and alopecia areata&#44; among others<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">25</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46; Lichenoid lesions tend to appear earlier and may evolve into sclerotic lesions&#44; although not all such lesions have a lichenoid derivation&#44; nor do all lichenoids evolve in this way&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">14</span></a> It is not unusual for lesions to appear on skin previously damaged by burns&#44; radiotherapy&#44; or herpes infection &#40;isotopic response&#41; or where there has been repeated trauma &#40;isomorphic response&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><elsevierMultimedia ident="fig0020"></elsevierMultimedia><p id="par0135" class="elsevierStylePara elsevierViewall">Although nail involvement is of relatively little importance&#44; it affects half of patients with chronic GVHD&#46; Manifestations might take the form of nail dystrophy&#44; thickening&#44; thinning onycholysis&#44; vertical striae&#44; or pterygium&#46; Similarly&#44; the scalp is often involved&#44; through alopecia &#40;scarring or nonscarring&#41;&#44; although the root causes are usually multiple &#40;e&#46;g&#46;&#44; chemotherapy&#44; radiotherapy&#44; hormone changes&#44; deficits&#44; GVHD&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0140" class="elsevierStylePara elsevierViewall">Oral mucosa may be affected by oral lichen planus&#44; hyperkeratosis&#44; sclerosis&#44; xerostomia&#44; mucocele&#44; mucosal atrophy&#44; pseudomembranes&#44; and ulcers&#44; among other conditions<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0020">Fig&#46; 4</a>&#41;&#46;</p><p id="par0145" class="elsevierStylePara elsevierViewall">Genital mucosal involvement is less common and the patient does not usually ask about it spontaneously&#46; Direct questioning and a complete physical examination is therefore required to rule out this manifestation&#44; which is often an obstacle for sexual relations&#46; Genital lichen planus&#44; vaginal stenosis&#44; erosions&#44; fissures&#44; or ulcers may be present&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0150" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> lists the cutaneous and mucosal signs and symptoms of chronic cutaneous GVHD&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0155" class="elsevierStylePara elsevierViewall">Chronic GVHD is graded in order to indicate severity and evaluate response to treatment&#46; Grading systems are available for specific organs or to evaluate GVHD globally according to type and number of organs involved and severity&#46; The most widely used system in clinical practice&#44; because assessment is rapid and simple&#44; is that of the US National Institutes of Health &#40;NIH&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0430"><span class="elsevierStyleSup">26&#8211;28</span></a> A severity level of 0 to 3 assigned for each affected organ takes into consideration the impact on function&#46; <a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> shows the NIH grading system for the skin and oral and genital mucosa&#46; Other more complex scales are available for use in clinical trials&#44; although comparative studies have not demonstrated they are superior to the NIH&#39;s for determining disease activity&#44; the physician and patient&#39;s perception&#44; or relation to survival&#46;<a class="elsevierStyleCrossRefs" href="#bib0445"><span class="elsevierStyleSup">29&#44;30</span></a></p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Diagnosis and Differential Diagnosis</span><p id="par0160" class="elsevierStylePara elsevierViewall">The signs and symptoms of chronic GVHD are classified by type as follows<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a>&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">-</span><p id="par0165" class="elsevierStylePara elsevierViewall">Diagnostic&#58; sufficient to establish a diagnosis of chronic GVHD without resort to other tests</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">-</span><p id="par0170" class="elsevierStylePara elsevierViewall">Distinctive&#58; insufficient alone for establishing a firm diagnosis without complementary tests or evidence of lesions on other organs</p></li><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">-</span><p id="par0175" class="elsevierStylePara elsevierViewall">Other features&#44; or unclassified ones&#58; also insufficient for establishing a diagnosis</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">-</span><p id="par0180" class="elsevierStylePara elsevierViewall">Common features&#58; seen in both chronic and acute GVHD</p></li></ul></p><p id="par0185" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a> summarizes skin and mucosal signs and symptoms according to these categories&#46;</p><p id="par0190" class="elsevierStylePara elsevierViewall">A diagnosis of chronic GVHD requires the following findings<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a>&#58;<ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">-</span><p id="par0195" class="elsevierStylePara elsevierViewall">The presence of at least 1 diagnostic sign or symptom&#44; or the presence of at least 1 distinctive sign or symptom plus histologic confirmation</p></li><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">-</span><p id="par0200" class="elsevierStylePara elsevierViewall">The exclusion of other possible diagnoses</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">-</span><p id="par0205" class="elsevierStylePara elsevierViewall">Differential diagnosis with acute GVHD</p></li></ul></p><p id="par0210" class="elsevierStylePara elsevierViewall">It is important to remember that not all skin lesions in patients who have undergone HSCT are signs of GVHD&#46; Like other patients&#44; graft recipients can also develop drug reactions&#44; inflammatory lesions&#44; infections&#44; benign or malignant tumors&#44; or other conditions&#46; Therefore&#44; the physician must consider the correlation of clinical and pathologic features and timing when diagnosing any skin lesion&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Histopathology and Pathologic Staging</span><p id="par0215" class="elsevierStylePara elsevierViewall">A skin biopsy is recommended to confirm diagnosis&#44; although it is not absolutely necessary if the patient has a sign or symptom considered diagnostic&#46; Biopsies are suggestive but not specific for either chronic or acute GVHD&#44; although a histologic report that findings are &#8220;compatible with&#8221; or &#8220;diagnostic for&#8221; GVHD is sufficient to confirm the diagnosis if the patient has manifestations classified as distinctive&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a> The minimum histologic criteria that must be met for diagnosis are the presence of apoptosis in the basement membrane of the epidermis or the external root sheath of a hair follicle or the acrosyringium&#46; These findings may be accompanied by a lichenoid infiltrate&#44; vacuolar changes or lymphocytes surrounding necrotic keratinocytes &#40;lymphocyte satellitosis&#41;&#46; There are additional specific criteria according to type of chronic GVHD<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">32</span></a> &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46;</p></span></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Treatment</span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Prophylaxis and Life Support</span><p id="par0220" class="elsevierStylePara elsevierViewall">Following HSCT&#44; all patients should keep skin well hydrated&#44; undertake moderate exercise&#44; and avoid sun exposure by using sun blockers and sun glasses&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">Dry mouth and genitalia are very common symptoms of GVHD and can be alleviated through topical and oral medications<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">33</span></a>&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">-</span><p id="par0230" class="elsevierStylePara elsevierViewall">Dry mouth syndrome&#58; artificial saliva and oral pilocarpine &#40;5<span class="elsevierStyleHsp" style=""></span>mg every 6&#8211;8<span class="elsevierStyleHsp" style=""></span>h&#41;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">34</span></a></p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">-</span><p id="par0235" class="elsevierStylePara elsevierViewall">Dry genitals&#58; humectants and hormonal therapy&#46;</p></li></ul></p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Acute GVHD</span><p id="par0240" class="elsevierStylePara elsevierViewall">Given that acute GVHD is a multisystem disease that appears in immunocompromised patients&#44; and customarily presents during hospitalization for HSCT&#44; the treating physician is usually a hematologist&#46; The first line of therapy is methylprednisolone&#44; and if there is no response&#44; a second drug &#40;e&#46;g&#46;&#44; antithymocyte globulin&#44; mycophenolate mofetil&#44; anti-tumor necrosis factor agents&#44; or sirolimus&#41; can be added&#44; using departmental regimens and a tailored approach&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">35</span></a> However&#44; the main approach to acute GVHD is to prevent it&#44; through the use of corticosteroids&#44; ciclosporin&#44; and&#47;or methotrexate&#46;<a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">36</span></a></p><p id="par0245" class="elsevierStylePara elsevierViewall">Topical treatments for skin manifestations of GVHD are inadequate&#46; Phototherapy may be useful in cases that are resistant to conventional treatment&#46;<a class="elsevierStyleCrossRefs" href="#bib0485"><span class="elsevierStyleSup">37&#8211;42</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Chronic GVHD</span><p id="par0250" class="elsevierStylePara elsevierViewall">Dermatologists play a more important role in managing and treating chronic GVHD&#46; Certain issues must be considered before choosing an approach&#46; Once again&#44; we should recall the multisystem nature of the disease and always investigate the involvement of other organs&#46; It is also important to distinguish sclerodermiform and nonsclerodermiform types&#44; verify depth &#40;epidermal&#44; dermal&#44; or subcutaneous involvement&#41;&#44; note the extension of manifestations &#40;localized vs generalized&#41;&#44; and consider location when evaluating cutaneous signs&#46; Manifestations involving more than 50&#37; of the BSA predict a poor prognosis&#46;<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">43</span></a></p><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Topical Treatments</span><p id="par0255" class="elsevierStylePara elsevierViewall">When skin manifestations are localized&#44; epidermal&#44; or dermal&#44; topical preparations can be used&#46; Corticosteroids<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">33</span></a> and tacrolimus<a class="elsevierStyleCrossRefs" href="#bib0520"><span class="elsevierStyleSup">44&#44;45</span></a> can be useful&#59; the second is particularly appropriate for the face and skin folds and as a way to reduce corticosteroid use&#46; Topical medications can also be used on the oral and genital mucosa&#46;<a class="elsevierStyleCrossRefs" href="#bib0530"><span class="elsevierStyleSup">46&#44;47</span></a> Different corticosteroids are prescribed according to their potency at the affected site and lesion depth&#46;</p><p id="par0260" class="elsevierStylePara elsevierViewall">Formulations that are useful inside the mouth are 0&#46;1&#37; triamcinolone acetonide &#40;mouthwash or oral adhesive gel&#41;&#44; 0&#46;05&#37; clobetasol &#40;oral adhesive gel&#41;&#44; and 0&#46;1&#37; tacrolimus &#40;ointment&#41;&#59; a ciclosporin mouthwash can be useful in patients on long-term corticosteroids&#46;<a class="elsevierStyleCrossRef" href="#bib0540"><span class="elsevierStyleSup">48</span></a></p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Systemic Treatments</span><p id="par0265" class="elsevierStylePara elsevierViewall">Systemic therapy should be considered whenever topical treatments targeting the skin have failed &#40;i&#46;e&#46;&#44; signs or symptoms do not improve or become worse&#41;&#44; multiple organs or a high percentage of the BSA is involved&#44; or cutaneous or fascial sclerosis has been demonstrated&#46;<a class="elsevierStyleCrossRefs" href="#bib0415"><span class="elsevierStyleSup">23&#44;31</span></a> The patient&#39;s concomitant conditions&#44; general state of health&#44; disease phase&#44; and risk of infection must be factored into the decision&#46;</p><p id="par0270" class="elsevierStylePara elsevierViewall">Oral prednisone at a dose of 1<span class="elsevierStyleHsp" style=""></span>mg&#47;kg is the first line of treatment&#46; There is no standardized rescue treatment if prednisone fails&#46; The choice of alternatives should be individualized according to clinical manifestations of GVHD and other patient-related factors&#46; Sirolimus&#44; mycophenolate mofetil&#44; rituximab&#44; imatinib&#44; azathioprine&#44; thalidomide&#44; methotrexate&#44; and others can be used&#46; Of all these alternatives&#44; imatinib mesylate at a dose of 100 to 200<span class="elsevierStyleHsp" style=""></span>mg&#47;d is the most specific for sclerodermiform cutaneous GVHD&#46;<a class="elsevierStyleCrossRefs" href="#bib0545"><span class="elsevierStyleSup">49&#8211;51</span></a> In all cases in which systemic treatment is being considered&#44; the hematologist and other specialists treating the patient should be consulted and consensus sought&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Physical Therapies</span><p id="par0275" class="elsevierStylePara elsevierViewall"><ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">1&#46;</span><p id="par0280" class="elsevierStylePara elsevierViewall">Phototherapy&#46; Psoralen plus UV-A &#40;PUVA&#41;&#44; UV-A1&#44; UV-B&#44; and narrow-band UV-B phototherapies have been used&#46;<a class="elsevierStyleCrossRef" href="#bib0560"><span class="elsevierStyleSup">52</span></a> These alternative therapies can be useful for patients with generalized lesions that are refractory to other measures&#44; or they can be used as a corticoid-sparing strategy&#46;<a class="elsevierStyleCrossRef" href="#bib0565"><span class="elsevierStyleSup">53</span></a> The choice of type of phototherapy is based mainly on the depth of lesions and the patient&#39;s concomitant conditions&#46; Sclerotic lesions respond best to PUVA&#44; whereas superficial lesions respond to narrow-band UV-B treatment&#46; A finding of ocular GVHD would contraindicate PUVA&#46; The dermatologist should take care to investigate any photsensitizing drugs &#40;especially voriconazole&#41; the patient might be taking as well as a positive antinuclear antibody test result&#46;<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">54</span></a></p></li><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">2&#46;</span><p id="par0285" class="elsevierStylePara elsevierViewall">Extracorporeal photopheresis&#46; This therapy is particularly appropriate for cutaneomucosal forms of GVHD and patients who have become dependent on corticosteroids or have hepatic or pulmonary involvement&#46;<a class="elsevierStyleCrossRefs" href="#bib0575"><span class="elsevierStyleSup">55&#44;56</span></a> The technique requires placement of a central venous catheter for apheresis of white blood cells and platelets from whole blood&#46; After treatment with PUVA&#44; the concentrated collected blood is reinfused&#46; The procedure&#44; which is repeated twice a week for several months&#44; is time-consuming&#46; Although few side effects develop during treatment&#44; risk of infection and sepsis is present&#46;</p></li></ul></p><p id="par0290" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#fig0025">Figure 5</a> shows a flow chart of available treatments for chronic cutaneous GVHD&#46;</p><elsevierMultimedia ident="fig0025"></elsevierMultimedia></span></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Measuring Therapeutic Response</span><p id="par0295" class="elsevierStylePara elsevierViewall">No validated&#44; standardized criteria are available for measuring response to therapy for chronic cutaneous GVHD&#46; This situation complicates the management of this condition and the design of clinical trials&#46;</p><p id="par0300" class="elsevierStylePara elsevierViewall">Disease activity must be measured at 2 time points in order to quantify and compare response&#46; It is important to assess skin lesions&#44; depth of involvement &#40;epidermis&#44; dermis&#44; or subcutaneous tissue&#41;&#44; and BSA expressed as a percentage&#46;</p><p id="par0305" class="elsevierStylePara elsevierViewall">Definitions for complete response &#40;all lesions have disappeared&#41;&#44; partial response &#40;only improvement can be perceived&#41;&#44; and progression &#40;the condition has worsened&#41; have been proposed&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">31</span></a> However&#44; the definitions are subjective and reproducibility is a problem&#46; Furthermore&#44; clinical manifestations are varied &#40;dry mouth&#44; sclerotic cutaneous lesions&#44; etc&#46;&#41; and the fact that some are irreversible makes it difficult to standardize response criteria&#46;</p></span></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Outlook for the Future</span><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Acute GVHD</span><p id="par0310" class="elsevierStylePara elsevierViewall">Acute GVHD continues to represent the main limiting factor affecting the use of allogeneic HSCT&#46; Biomarkers for early risk assessment and diagnosis are needed&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">57</span></a> The treatment of acute GVHD is less than optimal&#44; and we need new approaches to prevention and management that preserve the antitumor effects of the graft&#46;</p></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Chronic GVHD</span><p id="par0315" class="elsevierStylePara elsevierViewall">The pathogenesis of chronic GVHD is still poorly understood&#46; Interest in the role of cytokines in the development of clinical signs and their influence on severity has increased given that greater understanding might suggest potential therapeutic targets&#46;<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">58</span></a></p><p id="par0320" class="elsevierStylePara elsevierViewall">Assessing response to chronic GVHD therapy is one of the greatest challenges we face&#46; Available grading systems are unable to assess disease extension and severity or measure the effect of treatment&#46; There are no clinical or laboratory findings that can distinguish active chronic GVHD from residual fibrosis&#46;</p><p id="par0325" class="elsevierStylePara elsevierViewall">Nor is there a laboratory test for a biomarker that can predict risk of developing chronic GVHD&#44; response to treatment&#44; or survival&#46; Such biomarkers are essential for identifying risk and initiating treatment early as well as for closely monitoring response&#46; They can also be helpful for measuring disease activity and the balance between chronic GVHD and the antileukemia effect of the graft&#46; Biomarkers are currently being developed and their use validated&#44; but none have been applied routinely in clinical practice&#46;<a class="elsevierStyleCrossRefs" href="#bib0595"><span class="elsevierStyleSup">59&#44;60</span></a></p></span></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Conclusions</span><p id="par0330" class="elsevierStylePara elsevierViewall">GVHD is a multisystem disease that can affect any organ and should therefore be managed through a multidisciplinary approach&#46;</p><p id="par0335" class="elsevierStylePara elsevierViewall">Improving our understanding of GVHD and validating biomarkers of disease activity can help us maximize the therapeutic potential of HSCT and minimize the risk of GVHD&#46;</p></span><span id="sec0115" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Conflicts of Interest</span><p id="par0340" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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              "identificador" => "sec0070"
              "titulo" => "Chronic GVHD"
              "secciones" => array:3 [
                0 => array:2 [
                  "identificador" => "sec0075"
                  "titulo" => "Topical Treatments"
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                1 => array:2 [
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                  "titulo" => "Systemic Treatments"
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                2 => array:2 [
                  "identificador" => "sec0085"
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            3 => array:2 [
              "identificador" => "sec0090"
              "titulo" => "Measuring Therapeutic Response"
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          ]
        ]
        9 => array:3 [
          "identificador" => "sec0095"
          "titulo" => "Outlook for the Future"
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            0 => array:2 [
              "identificador" => "sec0100"
              "titulo" => "Acute GVHD"
            ]
            1 => array:2 [
              "identificador" => "sec0105"
              "titulo" => "Chronic GVHD"
            ]
          ]
        ]
        10 => array:2 [
          "identificador" => "sec0110"
          "titulo" => "Conclusions"
        ]
        11 => array:2 [
          "identificador" => "sec0115"
          "titulo" => "Conflicts of Interest"
        ]
        12 => array:2 [
          "identificador" => "xack276176"
          "titulo" => "Acknowledgments"
        ]
        13 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
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        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec819960"
          "palabras" => array:3 [
            0 => "Cutaneous graft-versus-host disease"
            1 => "Hematopoietic stem cell transplant"
            2 => "Dermopathology"
          ]
        ]
      ]
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        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Palabras clave"
          "identificador" => "xpalclavsec819959"
          "palabras" => array:3 [
            0 => "Enfermedad injerto contra hu&#233;sped cut&#225;nea"
            1 => "Trasplante de progenitores hematopoy&#233;ticos"
            2 => "Dermatopatolog&#237;a"
          ]
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      ]
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    "resumen" => array:2 [
      "en" => array:2 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Graft-vs-host disease &#40;GVHD&#41; is a multisystem disease that arises as a complication of allogeneic hematopoietic stem cell transplant&#46; It is due to recognition of the recipient&#39;s tissues by immune cells from the donor&#46; The skin and mucous membranes are the organs most commonly affected&#46; GVHD is classified as acute or chronic depending on the pathophysiology and clinical presentation&#46; Acute GVHD typically presents with the triad of rash&#44; diarrhea&#44; and hyperbilirubinemia&#44; and treatment is based on systemic corticosteroid and immunosuppressant therapy&#46; The cutaneous manifestations of chronic GVHD are divided into sclerodermiform and nonsclerodermiform&#44; and the mucous membranes and skin appendages may also be affected&#46; The diagnosis is mainly clinical&#44; but skin biopsy can help in doubtful cases&#46; Treatment can be topical&#44; systemic&#44; or physical&#44; depending on the size&#44; site&#44; and depth of the lesions and the involvement of other organs&#46;</p></span>"
      ]
      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">La enfermedad injerto contra hu&#233;sped &#40;EICH&#41; es una enfermedad multisist&#233;mica que aparece como complicaci&#243;n de un trasplante de progenitores hematopoy&#233;ticos alog&#233;nico&#46; Se basa en el reconocimiento de tejidos del receptor por parte de la inmunidad heredada del donante&#46; La piel y las mucosas son los &#243;rganos m&#225;s frecuentemente afectados&#46; Se clasifica en aguda y cr&#243;nica&#44; en funci&#243;n de su fisiopatolog&#237;a y presentaci&#243;n cl&#237;nica&#46; La forma aguda se manifiesta t&#237;picamente con la tr&#237;ada de exantema&#44; diarrea e hiperbilirrubinemia&#44; y el tratamiento se basa en el uso de corticoides e inmunosupresores sist&#233;micos&#46; Las manifestaciones cut&#225;neas de la forma cr&#243;nica se dividen en esclerodermiformes y no esclerodermiformes&#46; Puede afectar tambi&#233;n a mucosas y faneras&#46; El diagn&#243;stico es fundamentalmente cl&#237;nico&#44; aunque en casos dudosos la biopsia cut&#225;nea puede ayudar a confirmarlo&#46; El tratamiento puede ser t&#243;pico&#44; sist&#233;mico o f&#237;sico&#44; en funci&#243;n de la extensi&#243;n&#44; localizaci&#243;n&#44; profundidad de las lesiones y afectaci&#243;n de otros &#243;rganos&#46;</p></span>"
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    ]
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        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0015">Please cite this article as&#58; Ballester-S&#225;nchez R&#44; Navarro-Mira M&#44; Sanz-Caballer J&#44; Botella-Estrada R&#46; Aproximaci&#243;n a la enfermedad injerto contra hu&#233;sped cut&#225;nea&#46; Actas Dermosifiliogr&#46; 2016&#59;107&#58;183&#8211;193&#46;</p>"
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Schematic depiction of the courses of acute and chronic GVHD&#46; GVHD refers to graft-vs-host disease&#59; GI&#44; gastrointestinal&#46; Adapted from <span class="elsevierStyleInterRef" id="intr0005" href="http://ccr.cancer.gov/resources/gvhd/about.asp">http&#58;&#47;&#47;ccr&#46;cancer&#46;gov&#47;resources&#47;gvhd&#47;about&#46;asp</span>&#46;</p>"
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          "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Signs and symptoms of acute graft-vs-host disease&#46; A&#44; Confluent&#44; foliculotropic macular rash on the trunk&#46; B&#44; Eruption behind the ear&#46; C&#44; Close view of the rash&#46; D&#44; Palmar involvement&#46;</p>"
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          "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Histopathology of cutaneous GVHD&#46;</p> <p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">A and B&#44; Acute GVHD&#46; Hematoxylin and eosin &#40;H&#38;E&#41;&#44; original magnification &#215;<span class="elsevierStyleHsp" style=""></span>200 and H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>400&#44; respectively&#46; Interface dermatitis with necrotic keratinocytes surrounded by lymphocytes &#40;lymphocyte satellitosis&#41;&#46; C and D&#44; Chronic GVHD&#46; H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>100 and H&#38;E&#44; original magnification<span class="elsevierStyleHsp" style=""></span>&#215;<span class="elsevierStyleHsp" style=""></span>200&#46; Interface dermatitis with dermal-epidermal detachment and follicular involvement&#46;</p>"
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          "en" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Signs of chronic cutaneous and mucosal graft-vs-host disease&#46;</p> <p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">A&#44; Poikiloderma&#46; B&#44; Nongenital lichen sclerosus et atrophicus&#46; C&#44; Lichenoid eruption&#46; D&#44; Morphea&#46; E&#44; Fasciitis&#46; F&#44; Keratosis pilaris&#46; G&#44; Oral lichen planus&#46; H&#44; Oral erosion and ulcers&#46; I&#44; Hyperkeratosis and fissures&#46;</p>"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Flow chart for treatment of chronic cutaneous GVHD&#46;</p> <p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">GVHD refers to graft-vs-host disease&#59; CT&#44; clinical trial&#59; PUVA&#44; psoralen plus UV-A&#59; NB-UV-B&#44; narrow-band UV-B&#46;</p> <p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Adapted from Hymes et al&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">23</span></a></p>"
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          "leyenda" => "<p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Adapted from Filopovich et al&#46;<a class="elsevierStyleCrossRef" href="#bib0325"><span class="elsevierStyleSup">5</span></a></p><p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Abbreviations&#58; GVHD&#44; graft-vs-host disease&#59; HSCT&#44; hematopoietic stem cell transplant</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Types&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Time Elapsed Since HSCT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Signs and Symptoms of Acute GVHD<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Signs and Symptoms of Chronic GVHD<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">b</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleBold">Acute GVHD</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Classic</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#8804;<span class="elsevierStyleHsp" style=""></span>100 d&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Persistent&#44; recurrent&#44; or late-onset</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">&#62;<span class="elsevierStyleHsp" style=""></span>100 d&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="4" align="left" valign="top"><span class="elsevierStyleBold">Chronic GVHD</span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Classic</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No time limits&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Lichenoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Earlier&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleHsp" style=""></span>Sclerodermoid&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Later&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleItalic">Overlap syndrome</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Maculopapular rash&#44; diarrhea&#44; or cholestatic hepatitis</p>"
            ]
            1 => array:3 [
              "identificador" => "tblfn0010"
              "etiqueta" => "b"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Multiple organs &#40;fibrosis&#41;&#46;</p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">GVHD Classification&#46;</p>"
        ]
      ]
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        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Diagnostic Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Distinctive Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Other Features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Features Common to Both Acute and Chronic GVHD&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Skin</td><td class="td" title="table-entry  " align="left" valign="top">Poikiloderma&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Depigmentation</td><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Changes in sweating</td><td class="td" title="table-entry  " align="left" valign="top">Erythema&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Lichen planus-like features&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Maculopapular rash&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Sclerotic changes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pruritus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Morphea&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Lichen sclerosus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Mouth</td><td class="td" title="table-entry  " align="left" valign="top">Lichen planus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Xerostomia&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Gingivitis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Hyperkeratosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucoceles&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucositis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mucosal atrophy&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Erythema&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pseudomembranes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pain&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Ulcers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Genitalia</td><td class="td" title="table-entry  " align="left" valign="top">Lichen planus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Erosions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Vaginal stenosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Fissures&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Ulcers&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="5" align="left" valign="top">Nails</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Dystrophic nails&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Brittle nails&#44; striations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Onycholysis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pterygium&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Nail loss&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="2" align="left" valign="top">Scalp</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Alopecia&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Fine&#44; uneven or dull hair&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Papulosquamous lesions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Early graying&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">Signs and Symptoms of Chronic GVHD&#46;</p>"
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          "leyenda" => "<p id="spar0085" class="elsevierStyleSimplePara elsevierViewall">Abbreviations&#58; BSA&#44; body surface area&#59; GVHD&#44; graft-vs-host disease&#59; NIH&#44; National Institutes of Health&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
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                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">0&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " colspan="3" align="center" valign="top">No signs or symptoms</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on &#8804;<span class="elsevierStyleHsp" style=""></span>18&#37;<span class="elsevierStyleHsp" style=""></span>of the BSA&#44; without sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mild symptoms&#44; not significantly limiting oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mild symptoms with no impact on sexual function&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on 19&#37; to 50&#37; of the BSA&#44; with superficial sclerosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Moderate symptoms with partial limitation of oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Moderate signs&#44; with discomfort on examination&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Skin signs on &#8805;<span class="elsevierStyleHsp" style=""></span>50&#37; of the BSA<br>Deep sclerosis<br>Impaired mobility&#44; ulceration&#44; or severe itching&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Severe symptoms with major limitation of oral intake&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Advanced signs &#40;vaginal stenosis&#44; labial agglutination&#44; severe ulcers&#41; and severe pain during coitus&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0080" class="elsevierStyleSimplePara elsevierViewall">US NIH Grading System for Chronic GVHD&#46;</p>"
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      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "bibs0005"
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                          "etal" => false
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                        ]
                      ]
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                  ]
                  "host" => array:1 [
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                            1 => "E&#46; Agura"
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                0 => array:2 [
                  "contribucion" => array:1 [
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                          "etal" => false
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                            1 => "B&#46;R&#46; Blazar"
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                            1 => "D&#46; Weisdorf"
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                  "host" => array:1 [
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                      "doi" => "10.1016/j.bbmt.2005.09.004"
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                        0 => array:2 [
                          "etal" => true
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                            0 => "Y&#46; Sakoda"
                            1 => "D&#46; Hashimoto"
                            2 => "S&#46; Asakura"
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        "texto" => "<p id="par0350" class="elsevierStylePara elsevierViewall">We thank Pau Alonso and Conrad Pujol of the hematology section of the pathology department of Hospital Universitario y Polit&#233;cnico de la Fe in Valencia&#44; Spain&#46;</p>"
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Información del artículo
ISSN: 15782190
Idioma original: Inglés
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