Leishmaniose gástrica mimetizando adenocarcinoma: achados endoscópicos / Leishmaniasis gastric adenocarcinoma mimicking: endoscopic findings

Em áreas endêmicas de leishmaniose, as formas atípicas da doença podem ser identificadas. Apresentamos caso de leishmaniose sistêmica, cujo diagnóstico foi realizado pela biópsia endoscópica. Paciente masculino, 45 anos de idade, HIV positivo fora de tratamento devido aos efeitos gástricos da medicação antirretroviral, que vive em Araçatuba ­ SP. O paciente apresentou queixas dispépticas e "clocking" por dois anos. Foi submetido à endoscopia digestiva, tendo sido identificada volumosa lesão ulcerada com bordas sobrelevadas na região da incisura, estando coberta por fibrina e medindo aproximadamente 6cm x 4cm.

The cell-mediated immune reaction in the cutaneous lesion of chromoblastomycosis and their correlation with different clinical forms of the disease

Chromoblastomycosis is a fungal infection caused by dematiaceous fungi inducing skin lesions of difficult treatment and of frequent recurrence. The objective of the present investigation was to characterize cell-mediated tissue reactions in the skin in cases of Chromoblastomycosis using histopathology and immunocytochemistry methods and to correlate them with different clinical forms of Chromoblastomycosis. Biopsies from 19 patients were stained with HE and Giemsa, and serial sections were immunohistochemically stained using CD45RO, CD20, CD4, CD8, CD68, CD1a, CD34, IL4, IL10, TNF-alpha and IFN-gamma antibodies. A quantitative and semiquantitative analysis of the cell subsets and cytokines in the inflammatory infiltrates was performed by counting ten high-power fields (400x). The cutaneous lesion presented as verrucous plaque (n = 15) or erythematous atrophic plaque (n = 4). We observed two types of tissue reaction: A) a granulomatous reaction with a suppurative granuloma with several fungi cells in the cutaneous lesion presenting as verrucous plaque; B) a granulomatous reaction with a tuberculoid granuloma with few fungi cells in the cutaneous lesion presenting as atrophic plaque. The data obtained suggest that patients with lesion presented as verrucous plaque have a type Th2 immunological response, while patients with lesion presented as erythematous atrophic plaque have a type Th1 response