Infundibular cyst with seborrheic verrucalike cyst walls in a patient with Yusho disease exposed to dioxins

摘要

Infundibular cysts with seborrheic verruca-like cyst walls, originally reported as epidermoid cysts with seborrheic verruca-like cyst walls, are rare cystic tumors that are thought to arise from the follicular infundibulum [1]. His-tologically, the cyst walls are acanthotic and papillomatous, and may contain pseudohorn cysts or squamous eddies similar to those in seborrheic keratosis [1,2]. We report a case of infundibular cyst with seborrheic verruca-like cyst walls associated with an accidental exposure to dioxins in a mass food poisoning, called Yusho disease.