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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Case description</span><p id="par0005" class="elsevierStylePara elsevierViewall">This is the case of a 32-year-old man with an 8-year history of acute myeloid leukemia &#40;AML&#41; who was admitted for his 3rd allogeneic bone marrow transplant &#40;BMT&#41;&#46; Two weeks after hospitalization&#44; the patient developed febrile neutropenia and respiratory symptoms&#44; despite being on prophylactic treatment with levofloxacin&#44; amikacin&#44; posaconazole&#44; and acyclovir&#46; A thoracic computerized tomography &#40;CT&#41; scan confirmed the presence of three nodular lesions in the right upper lobe&#44; which led to adding isavuconazole and amphotericin B to the antimicrobial regimen&#46; On day &#43;42 after BMT&#44; the patient presented with progressively spreading erythematous papules and plaques on the trunk and extremities&#44; some with blisters&#44; and a central crust &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46; Two palpable and painful subcutaneous nodules were also noted on the left thigh&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Supplementary tests</span><p id="par0010" class="elsevierStylePara elsevierViewall">Two skin biopsies were performed on a plaque and a subcutaneous nodule&#46; Histopathology examination confirmed a substantial presence of elongated and septate hyphae across the dermis and epidermis and up to the stratum corneum &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>A&#41;&#46; Extensive panniculitis-like fat necrosis and hyphae inside the adipose tissue were also noted &#40;<a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a>B&#41;&#46; Before mycological confirmation&#44; the patient became obtunded&#46; The emergency CT scan of the brain revealed the presence of parenchymal lesions consistent with septic emboli&#46; Subsequent magnetic resonance imaging &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41; confirmed the findings&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0015" class="elsevierStylePara elsevierViewall">What is your diagnosis&#63;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Diagnosis</span><p id="par0020" class="elsevierStylePara elsevierViewall">Cutaneous disseminated aspergillosis&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Course of the disease and treatment</span><p id="par0025" class="elsevierStylePara elsevierViewall">The molecular analysis of the sample confirmed the presence of <span class="elsevierStyleItalic">Aspergillus alliaceus</span> as the causative pathogen&#46; Unfortunately&#44; despite treatment&#44; the patient died 48<span class="elsevierStyleHsp" style=""></span>h later&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Comment</span><p id="par0030" class="elsevierStylePara elsevierViewall">Aspergillosis is one of the most frequent opportunistic mycoses in patients with hematologic malignancies and neutropenia&#44; particularly those undergoing BNT for AML&#46; Predominant isolated pathogens include <span class="elsevierStyleItalic">Aspergillus fumigatus</span> and <span class="elsevierStyleItalic">Aspergillus flavus</span>&#46; Cutaneous aspergillosis only accounts for 4&#37; of all cases&#46; It typically manifests as a secondary condition resulting from hematogenous dissemination originating from a primary pulmonary focus&#46; Compared to primary aspergillosis&#44; this scenario is associated with a mortality rate close to 90&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0035"><span class="elsevierStyleSup">1</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall">Sometimes&#44; the clinical presentation can closely mimic that of other conditions&#44; such as secondary cutaneous mucormycosis&#44; leukemia cutis&#44; or disseminated cutaneous cryptococcosis&#46; Although not consistently evident&#44; clinical signs can significantly aid in differentiation&#46; For example&#44; a necrotic facial eschar stemming from a paranasal sinus suggests mucormycosis&#44; while umbilicated papules resembling molluscum contagiosum are suggestive of cryptococcosis&#46; In cases with a of nonspecific or ambiguous clinical presentation&#44; histopathology examinations prove invaluable in guiding diagnosis while awaiting microbiological confirmation&#46; Sometimes it is not straightforward due to the overlap in morphological appearance among different fungal genera&#46; Nevertheless&#44; the identification of narrow&#44; regularly septated hyphae branching in a &#8220;Y&#8221; shape is typical and suggestive of aspergillosis vs the thick&#44; hyaline&#44; non-septate&#44; bifurcating hyphae associated with significant necrosis&#44; thrombosis&#44; and multiple tissue infarction seen in mucormycosis&#46;<a class="elsevierStyleCrossRef" href="#bib0040"><span class="elsevierStyleSup">2</span></a> In leukemia cutis&#44; microorganisms are absent&#46; Instead&#44; a perivascular&#44; periadnexal&#44; nodular&#44; or diffuse infiltrate of monomorphic leukemic cells is observed&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">3</span></a> Finally&#44; in cryptococcosis&#44; round fungal elements with a polysaccharide capsule that stains magenta with PAS&#44; dark brown with Grocott&#44; and red with mucicarmine are observed&#44; in the absence of hyphae&#46;<a class="elsevierStyleCrossRef" href="#bib0050"><span class="elsevierStyleSup">4</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">This case illustrates a peculiar instance of secondary aspergillosis&#46; First&#44; we should mention the extensive involvement of all epidermal layers&#44; a condition rarely described in primary cutaneous aspergillosis and never seen in secondary disseminations&#46; Additionally&#44; there is significant fat necrosis in the hypodermis&#44; resembling pancreatic panniculitis&#44; which is also uncommon in this type of mycosis&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">5</span></a> Furthermore&#44; the pathogen involved&#44; <span class="elsevierStyleItalic">A&#46; alliaceus</span>&#44; is exceedingly rare&#44; with only three previous cases of human infection having been reported in the scientific medical literature currently available&#46; The identification of <span class="elsevierStyleItalic">Aspergillus</span> species through molecular biology is an expedited and highly valuable procedure&#46; Although it enables the differentiation between species that share similar morphology&#44; it also possess inherent resistance to antifungal therapies and termed cryptic species&#44; including <span class="elsevierStyleItalic">A&#46; alliaceus</span>&#44; which are associated with a worse prognosis and a higher mortality rate&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">6</span></a> Therefore&#44; accurate identification of the <span class="elsevierStyleItalic">Aspergillus</span> species involved in each case is of paramount importance to determine the right therapeutic approach&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conflict of interest</span><p id="par0045" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflict of interest&#46;</p></span></span>"
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Visitas
1904
Cases for Diagnosis
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Disponible online el 23 de marzo de 2024
Erythematous Papules, Plaques, and Nodules in a Patient With Acute Myeloid Leukemia
Pápulas, placas y nódulos eritematosos en paciente con leucemia mieloide aguda
Visitas
1904
A. Fernández-Galvána,
Autor para correspondencia
aufergal@hotmail.com

Corresponding author.
, J. Fragab, M. Llamas-Velascoa
a Dermatology Department, University Hospital of La Princesa, Madrid, Spain
b Pathology Department, University Hospital of La Princesa, Madrid, Spain
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Case description

This is the case of a 32-year-old man with an 8-year history of acute myeloid leukemia (AML) who was admitted for his 3rd allogeneic bone marrow transplant (BMT). Two weeks after hospitalization, the patient developed febrile neutropenia and respiratory symptoms, despite being on prophylactic treatment with levofloxacin, amikacin, posaconazole, and acyclovir. A thoracic computerized tomography (CT) scan confirmed the presence of three nodular lesions in the right upper lobe, which led to adding isavuconazole and amphotericin B to the antimicrobial regimen. On day +42 after BMT, the patient presented with progressively spreading erythematous papules and plaques on the trunk and extremities, some with blisters, and a central crust (Fig. 1). Two palpable and painful subcutaneous nodules were also noted on the left thigh.

Figure 1.

Clinical findings: abundant erythematous–edematous papules and plaques with vesicles and superficial crusts on the upper dorsal region.

(0.07MB).
Supplementary tests

Two skin biopsies were performed on a plaque and a subcutaneous nodule. Histopathology examination confirmed a substantial presence of elongated and septate hyphae across the dermis and epidermis and up to the stratum corneum (Fig. 2A). Extensive panniculitis-like fat necrosis and hyphae inside the adipose tissue were also noted (Fig. 2B). Before mycological confirmation, the patient became obtunded. The emergency CT scan of the brain revealed the presence of parenchymal lesions consistent with septic emboli. Subsequent magnetic resonance imaging (Fig. 3) confirmed the findings.

Figure 2.

Histological findings (H&E staining). (A) Cutaneous plaque sample: extensive invasion of superficial dermis and epidermis up to the stratum corneum (10×). (B) Subcutaneous nodule sample: panniculitis-like fat necrosis and presence of hyphae in adipose tissue (20×).

(0.05MB).
Figure 3.

MRI. Sagittal view. T2-weighted: multiple pseudonodular lesions with restricted diffusion and cortico-subcortical localization in association with acute ischemic infarcts.

(0.17MB).

What is your diagnosis?

Diagnosis

Cutaneous disseminated aspergillosis.

Course of the disease and treatment

The molecular analysis of the sample confirmed the presence of Aspergillus alliaceus as the causative pathogen. Unfortunately, despite treatment, the patient died 48h later.

Comment

Aspergillosis is one of the most frequent opportunistic mycoses in patients with hematologic malignancies and neutropenia, particularly those undergoing BNT for AML. Predominant isolated pathogens include Aspergillus fumigatus and Aspergillus flavus. Cutaneous aspergillosis only accounts for 4% of all cases. It typically manifests as a secondary condition resulting from hematogenous dissemination originating from a primary pulmonary focus. Compared to primary aspergillosis, this scenario is associated with a mortality rate close to 90%.1

Sometimes, the clinical presentation can closely mimic that of other conditions, such as secondary cutaneous mucormycosis, leukemia cutis, or disseminated cutaneous cryptococcosis. Although not consistently evident, clinical signs can significantly aid in differentiation. For example, a necrotic facial eschar stemming from a paranasal sinus suggests mucormycosis, while umbilicated papules resembling molluscum contagiosum are suggestive of cryptococcosis. In cases with a of nonspecific or ambiguous clinical presentation, histopathology examinations prove invaluable in guiding diagnosis while awaiting microbiological confirmation. Sometimes it is not straightforward due to the overlap in morphological appearance among different fungal genera. Nevertheless, the identification of narrow, regularly septated hyphae branching in a “Y” shape is typical and suggestive of aspergillosis vs the thick, hyaline, non-septate, bifurcating hyphae associated with significant necrosis, thrombosis, and multiple tissue infarction seen in mucormycosis.2 In leukemia cutis, microorganisms are absent. Instead, a perivascular, periadnexal, nodular, or diffuse infiltrate of monomorphic leukemic cells is observed.3 Finally, in cryptococcosis, round fungal elements with a polysaccharide capsule that stains magenta with PAS, dark brown with Grocott, and red with mucicarmine are observed, in the absence of hyphae.4

This case illustrates a peculiar instance of secondary aspergillosis. First, we should mention the extensive involvement of all epidermal layers, a condition rarely described in primary cutaneous aspergillosis and never seen in secondary disseminations. Additionally, there is significant fat necrosis in the hypodermis, resembling pancreatic panniculitis, which is also uncommon in this type of mycosis.5 Furthermore, the pathogen involved, A. alliaceus, is exceedingly rare, with only three previous cases of human infection having been reported in the scientific medical literature currently available. The identification of Aspergillus species through molecular biology is an expedited and highly valuable procedure. Although it enables the differentiation between species that share similar morphology, it also possess inherent resistance to antifungal therapies and termed cryptic species, including A. alliaceus, which are associated with a worse prognosis and a higher mortality rate.6 Therefore, accurate identification of the Aspergillus species involved in each case is of paramount importance to determine the right therapeutic approach.

Conflict of interest

The authors declare that they have no conflict of interest.

References
[1]
C. Bernardeschi, F. Foulet, S. Ingen-Housz-Oro, N. Ortonne, K. Sitbon, G. Quereux, et al.
Cutaneous invasive aspergillosis: retrospective multicenter study of the French invasive-aspergillosis registry and literature review.
Medicine (Baltimore), 94 (2015), pp. e1018
[2]
P. Quatresooz, C. Piérard-Franchimont, J.E. Arrese, G.E. Piérard.
Clinicopathologic presentations of dermatomycoses in cancer patients.
J Eur Acad Dermatol Venereol, 22 (2008), pp. 907-917
[3]
L. Martínez-Leboráns, A.M. Victoria-Martínez, J.L. Torregrosa-Calatayud, V. Alegre de Miquel.
Leukemia cutis: a report of 17 cases and a review of the literature.
Actas Dermosifiliogr, 107 (2016), pp. e65-e69
[4]
H. Noguchi, T. Matsumoto, U. Kimura, M. Hiruma, M. Kusuhara, H. Ihn.
Cutaneous cryptococcosis.
Med Mycol J, 60 (2019), pp. 101-107
[5]
I. Colmenero, M. Alonso-Sanz, F. Casco, A. Hernández-Martín, A. Torrelo.
Cutaneous aspergillosis mimicking pancreatic and gouty panniculitis.
J Am Acad Dermatol, 67 (2012), pp. 789-791
[6]
B. Ozhak-Baysan, A. Alastruey-Izquierdo, R. Saba, D. Ogunc, G. Ongut, A. Timuragaoglu, et al.
Aspergillus alliaceus and Aspergillus flavus co-infection in an acute myeloid leukemia patient.
Med Mycol, 48 (2010), pp. 995-999
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