Perineal endometriosis without perineal trauma: a case report.

Vulvar endometriosis can occur after surgery or trauma and cause dyspareunia. Endometriosis of the perineum and vulva is extremely rare without trauma. We report here a case of spontaneously developing perineal endometriosis successfully treated with local excision. A 23-year-old woman was admitted complaining of a vulvar lump. It had gradually increased in size. Gynecological examination showed a subcutaneous mass in the left perineum. The patient was treated by local excision of the vulvar mass, and complete excision was achieved. The pathological diagnosis of the excised tissue was endometriosis. The patient is well without evidence of disease 6 months following the local excision. Spontaneous perineal and vulvar endometriosis is extremely rare. Any vulvar lesion, regardless of its appearance and location, can be related to endometriosis. Surgical resection is recommended to relieve the symptoms and provide histological proof.