Lip Epidermoid Cyst Caused by a Piercing: A Report of a Rare Case.

We report the case of a lip epidermoid cyst, caused by piercing in a 23-year-old Japanese woman. She had an exophytic lesion in the lower lip associated with the piercing which was initially diagnosed as a mucous retention cyst. The lesion was resected under local anesthesia, and pathological examination revealed an epidermoid cyst, likely caused by piercings. Piercing-induced epidermoid cysts frequently occur in the tragus. There have been no reports of piercing-induced epidermoid cysts developing in the oral cavity. To our knowledge, this is the first report of a lip epidermal cyst caused by piercings. Six months have passed since the operation, and it has not recurred.