Flagellate Dermatitis following Shiitake Mushroom Consumption

Abstract

The diagnosis of Shiitake flagellate dermatitis is often overlooked due to the rarity of the condition and the commonality of shiitake mushroom consumption. As the popularity of shiitake mushroom rises and is further incorporated into Western diets, there will be a greater chance of coming across shiitake flagellate dermatitis. In this report, we present a middle-aged female patient who developed shiitake flagellate dermatitis following the consumption of shiitake mushrooms. The physical examination showed characteristic erythematous linear papules in a flagellate like pattern across her neck, abdomen, and thighs. Biopsies demonstrated perivascular, lymphocytic infiltrates with scarce eosinophils. Awareness and familiarity to this condition may aid in addressing patient’s worries and preventing unnecessary procedures or treatments which may exacerbate symptoms.