Angiolymphoid hyperplasia with eosinophilia is a rare and benign vascular tumor whose etiology remains uncertain. It clinically presents itself by angiomatous papules or nodules located on the head and neck. Many controversies in the literature are found in relation to angiolymphoid hyperplasia with eosinophilia and Kimura's disease - its main differential diagnosis - due to their clinical and histopathological similarities. However, currently, most studies agree that they are distinct diseases. The present case illustrates a characteristic description of angiolymphoid hyperplasia with eosinophilia and also highlights the main differences with Kimura's disease.

Shiitake Dermatitis is a skin eruption that resembles whiplash marks and occurs after consumption of raw shiitake mushrooms. It is caused by a toxic reaction to lentinan, a thermolabil polysaccharide which decomposes upon heating. We report the second case of this dermatitis in Brazil. A 25-year-old man presented with linearly arranged erythematous, pruritic papules on the trunk and limbs, after ingestion of a salad containing raw shiitake mushrooms. The eruption was self-limited, resolving within 10 days of onset. The recognition of this entity gains importance due to the increased consumption of shiitake mushrooms in occidental countries.

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Os autores descrevem o caso de um paciente masculino, jovem, apresentando lesões eritemato-descamativas, maceradas, nas regiões axilares e inguinais bilateralmente, além de placas eritematosas exulceradas no sulco interglúteo. O exame histopatológico da lesão cutânea foi compatível com histiocitose de células de Langerhans, com imuno-histoquímica positiva para CD1a e S100, confirmando o diagnóstico. Na investigação de doença sistêmica, foi observada lesão nodular extra-axial na cisterna suprasselar. O paciente foi submetido à quimioterapia sistêmica, com resolução das lesões cutâneas. Atualmente, mantém acompanhamento multidisciplinar pela Dermatologia, Hematologia e Endocrinologia.