Epidermal cyst in an unusual site: A case report.

Background: Epidermoid cysts can occur in a variety of locations including face, trunk, neck, extremities and scalp. Up to now, those vulvar epidermal cysts reported in the literature were localized on the labia majora and the clitoris. This is the first case of epidermal cyst reported on the labia minora.

Methods: A 47-year-old, multiparous woman presented with a history of a palpable vulvar mass, without pain but causing difficulty in walking. The large mass was 6cm in diameter and located in the left labium minus. The labial mass was surgically removed. The final pathologic diagnosis was a vulvar epidermoid cyst. The patient was discharged from hospital without any complications.

Conclusions: Total surgical excision of the mass is more appropriate for definitive histopathological diagnosis and for the prevention of future development of complications. MRI is very important in the localization of the mass and relationship with other tissues regarding treatment planning of larger vulvar masses. Conclusions: Epidermal cysts should be considered in the differential diagnosis of a vulvar mass.