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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Medical history</span><p id="par0005" class="elsevierStylePara elsevierViewall">A 22-year-old woman with no significant past medical history presented to the clinic with a 2-month history of an asymptomatic skin eruption on her right upper extremity&#46; Over time&#44; the lesions had grown in both number and extent&#46; The patient denied any previous bleeding or trauma in the affected region&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Physical examination</span><p id="par0010" class="elsevierStylePara elsevierViewall">Skin examination revealed the presence of reddish-brown macules strikingly distributed in a linear pattern on the anterior and inner regions of the patient&#39;s right arm and forearm &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>&#41;&#46; On closer inspection&#44; the lesions were composed of pinpoint petechiae &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>B&#41;&#46; Dermoscopy showed the presence of red dots and lines over a homogeneous brown area &#40;<a class="elsevierStyleCrossRef" href="#fig0010">fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Histopathology</span><p id="par0015" class="elsevierStylePara elsevierViewall">A slight perivascular lymphohistiocytic infiltrate with focal erythrocyte extravasation was identified&#44; without other notable findings &#40;<a class="elsevierStyleCrossRef" href="#fig0015">fig&#46; 3</a>A and B&#41;&#46; Perls&#8217; staining showed of a few iron deposits on the superficial dermis &#40;<a class="elsevierStyleCrossRef" href="#fig0015">fig&#46; 3</a>C&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Additional tests</span><p id="par0020" class="elsevierStylePara elsevierViewall">A complete blood test&#44; including platelet count&#44; coagulation study&#44; and vitamin C levels&#44; revealed no other pathological findings&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">What is your diagnosis&#63;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Diagnosis</span><p id="par0030" class="elsevierStylePara elsevierViewall">Unilateral linear capillaritis &#40;ULC&#41;&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Disease progression and treatment</span><p id="par0035" class="elsevierStylePara elsevierViewall">Given the nature of this condition&#44; the absence of symptoms&#44; and the tendency for spontaneous resolution&#44; we decided no to treat the patient&#46; The lesions disappeared within 6 months without leaving any scars or post-inflammatory hypo- or hyperpigmentation&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Comment</span><p id="par0040" class="elsevierStylePara elsevierViewall">ULC is a rare variant of pigmented purpuric dermatosis &#40;PPD&#41;&#44; first described by Riordan et al&#46; in 1992&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a> ULC is characterized by purpuric macules with a linear or pseudo-metameric distribution affecting a single limb&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">2</span></a> Although ULC typically occurs on the lower extremities of young men&#44; it can also affect the upper limbs&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">3</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">PPDs are disorders caused by capillaritis of unknown origin&#46; 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would be of interest&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">5</span></a> However&#44; in our case&#44; the rapid resolution of the lesions and the presence of vacuolar degeneration&#44; along with a series of hemosiderophages&#44; suggest ULC rather than lichen aureus&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">As with other PPD variants&#44; topical corticosteroids have proven effective for treating pruritus&#46; Psoralens and UVA phototherapy&#44; ascorbic acid&#44; rutin&#44; and griseofulvin have been used with variable effectiveness&#46; The prognosis of ULC is good&#44; with lesions typically resolving spontaneously within less than 2 years&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">In conclusion&#44; we have described a case of a rare PPD variant&#8212;ULC&#8212; in a woman with an atypical location but with clinical&#44; 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Cases for Diagnosis
Linear Distribution Lesions on a Young Woman's Arm
Lesiones de distribución lineal en el brazo de una mujer joven
V. Voloa,
Autor para correspondencia
victor.volo.bautista@gmail.com

Corresponding author.
, A. Pérez-Bustilloa, A.M. Carballido Vázqueza, G. Martínez-Garcíab
a Servicio de Dermatología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
b Servicio de Patología, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
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        "titulo" => "Lesiones de distribuci&#243;n lineal en el brazo de una mujer joven"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Medical history</span><p id="par0005" class="elsevierStylePara elsevierViewall">A 22-year-old woman with no significant past medical history presented to the clinic with a 2-month history of an asymptomatic skin eruption on her right upper extremity&#46; Over time&#44; the lesions had grown in both number and extent&#46; The patient denied any previous bleeding or trauma in the affected region&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Physical examination</span><p id="par0010" class="elsevierStylePara elsevierViewall">Skin examination revealed the presence of reddish-brown macules strikingly distributed in a linear pattern on the anterior and inner regions of the patient&#39;s right arm and forearm &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>&#41;&#46; On closer inspection&#44; the lesions were composed of pinpoint petechiae &#40;<a class="elsevierStyleCrossRef" href="#fig0005">fig&#46; 1</a>B&#41;&#46; Dermoscopy showed the presence of red dots and lines over a homogeneous brown area &#40;<a class="elsevierStyleCrossRef" href="#fig0010">fig&#46; 2</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Histopathology</span><p id="par0015" class="elsevierStylePara elsevierViewall">A slight perivascular lymphohistiocytic infiltrate with focal erythrocyte extravasation was identified&#44; without other notable findings &#40;<a class="elsevierStyleCrossRef" href="#fig0015">fig&#46; 3</a>A and B&#41;&#46; Perls&#8217; staining showed of a few iron deposits on the superficial dermis &#40;<a class="elsevierStyleCrossRef" href="#fig0015">fig&#46; 3</a>C&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Additional tests</span><p id="par0020" class="elsevierStylePara elsevierViewall">A complete blood test&#44; including platelet count&#44; coagulation study&#44; and vitamin C levels&#44; revealed no other pathological findings&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">What is your diagnosis&#63;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Diagnosis</span><p id="par0030" class="elsevierStylePara elsevierViewall">Unilateral linear capillaritis &#40;ULC&#41;&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Disease progression and treatment</span><p id="par0035" class="elsevierStylePara elsevierViewall">Given the nature of this condition&#44; the absence of symptoms&#44; and the tendency for spontaneous resolution&#44; we decided no to treat the patient&#46; The lesions disappeared within 6 months without leaving any scars or post-inflammatory hypo- or hyperpigmentation&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Comment</span><p id="par0040" class="elsevierStylePara elsevierViewall">ULC is a rare variant of pigmented purpuric dermatosis &#40;PPD&#41;&#44; first described by Riordan et al&#46; in 1992&#46;<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">1</span></a> ULC is characterized by purpuric macules with a linear or pseudo-metameric distribution affecting a single limb&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">2</span></a> Although ULC typically occurs on the lower extremities of young men&#44; it can also affect the upper limbs&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">3</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">PPDs are disorders caused by capillaritis of unknown origin&#46; All the different entities within PPDs exhibit similar histopathological findings&#44; such as perivascular lymphocytic infiltrates&#44; erythrocyte extravasation&#44; and hemosiderin deposits&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">4</span></a> The clinical features help differentiate the various subtypes of the disease&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">The differential diagnosis includes other dermatoses of linear or Blaschkoid distribution&#44; such as psoriasis&#44; linear verrucous epidermal nevus&#44; linear lichen striatus&#44; linear lichen planus&#44; certain viral exanthems&#44; unilateral nevoid telangiectasia&#44; and serpiginous angioma&#46; Additionally&#44; other PPD variants&#8212;particularly lichen aureus&#8212;should be ruled out as they can also clinically present with a linear or segmental morphology&#46; In this regard&#44; finding a dense band-like dermal infiltrate&#44; separated from the epidermis by an unaffected papillary dermis area &#40;Grenz zone&#41;&#44; would be of interest&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">5</span></a> However&#44; in our case&#44; the rapid resolution of the lesions and the presence of vacuolar degeneration&#44; along with a series of hemosiderophages&#44; suggest ULC rather than lichen aureus&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">As with other PPD variants&#44; topical corticosteroids have proven effective for treating pruritus&#46; Psoralens and UVA phototherapy&#44; ascorbic acid&#44; rutin&#44; and griseofulvin have been used with variable effectiveness&#46; The prognosis of ULC is good&#44; with lesions typically resolving spontaneously within less than 2 years&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">1&#44;3&#44;5</span></a></p><p id="par0060" class="elsevierStylePara elsevierViewall">In conclusion&#44; we have described a case of a rare PPD variant&#8212;ULC&#8212; in a woman with an atypical location but with clinical&#44; dermoscopic&#44; and histological findings characteristic of this condition&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Funding</span><p id="par0070" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Authors&#8217; contributions</span><p id="par0080" class="elsevierStylePara elsevierViewall">The authors made substantial contributions to the idea and design of the study&#44; drafting and critical revision of the manuscript&#44; approving its final version for publication&#46;</p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conflicts of interest</span><p id="par0075" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span></span>"
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