title: Shiitake dermatitis.
abstract: 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.
authors.affiliation: Hospital Federal da Lagoa, Rio de Janeiro, RJ, Brazil.
authors.forename: Camila Nemoto de
authors.initials: CN
authors.lastname: Mendonça
authors.affiliation: Hospital Federal da Lagoa, Rio de Janeiro, RJ, Brazil.
authors.forename: Priscila Mara Chaves E
authors.initials: PM
authors.lastname: Silva
authors.affiliation: Hospital Federal da Lagoa, Rio de Janeiro, RJ, Brazil.
authors.forename: João Carlos Regazzi
authors.initials: JC
authors.lastname: Avelleira
authors.affiliation: Hospital Federal da Lagoa, Rio de Janeiro, RJ, Brazil.
authors.forename: Fátima Satomi
authors.initials: FS
authors.lastname: Nishimori
authors.affiliation: Hospital Federal da Lagoa, Rio de Janeiro, RJ, Brazil.
authors.forename: Flavia de Freire
authors.initials: Fde F
authors.lastname: Cassia
mesh_terms: D000328:Adult; D003872:Dermatitis / Q000209:etiology* / Q000473:pathology; D004890:Erythema / Q000139:chemically induced* / Q000473:pathology; D006801:Humans; D008297:Male; D009145:Mushroom Poisoning / Q000150:complications* / Q000473:pathology; D020942:Shiitake Mushrooms
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