Shiitake dermatitis: the first case reported in Brazil.

Area of Science:

• Dermatology
• Toxicology
• Gastroenterology

Background:

• Shiitake dermatitis is a rare cutaneous reaction.
• It is characterized by papules and linear streaks.
• Potential triggers include bleomycin treatment, dermatomyositis, and shiitake mushroom (Lentinus edodes) ingestion.

Observation:

• Shiitake is the second most consumed mushroom globally.
• Raw or half-cooked shiitake can induce flagellate erythema.
• Higher incidence is noted in Oriental countries due to dietary habits.

Findings:

• This report details the first case of shiitake dermatitis in Brazil.
• The patient was a male who developed a rash after consuming raw shiitake mushrooms.
• The clinical presentation included papules and erythemato-violaceous linear streaks.

Implications:

• This case expands the geographical reporting of shiitake dermatitis.
• It underscores the importance of considering dietary causes for unexplained rashes.
• Increased awareness is crucial for early diagnosis and management, particularly with the mushroom's global popularity.