女性尿道後方に発生した類上皮平滑筋腫(平滑筋芽腫)の1例

Abstract

A 25-year-old woman was admitted to our hospital because of a painless, slow growing mass arising from the external genitalia. The mass had been developing for a few years. She did not have difficulty voiding nor was there hematuria. Magnetic resonance imaging revealed a well-circumscribed, 4 cm, solid tumor between the urethra and the anterior vaginal wall. After needle biopsy confirmed a benign tumor arising from the smooth muscle, the tumor was removed by a transvaginal approach. The histopathological diagnosis was epithelioid leiomyoma (leiomyoblastoma), which often occurs in the stomach or uterus, but seldom around the urethra. The patient has remained well without recurrence for 20 months after surgery.