[Bladder leiomyosarcoma: case report].

Objectives: To report a new case of bladder leiomyoma in an adult.

Methods: 64-year-old female patient consulting for a four-month hematuria diagnosed of a bladder intraluminal tumor on ultrasound during a routine gynecologic revision. Cystoscopy confirmed the presence of the tumor. Transurethral resection was indicated.

Results: Pathology reported a definitive diagnosis of leiomyosarcoma. Anterior pelvic exenteration was subsequently performed. On one year follow-up there is no evidence of disease.

Conclusions: We emphasize the rarity of these neoplasias. We comment on their main characteristics, pointing out the importance of immunohistochemical staining for the definitive histological diagnosis. We refer the therapeutic options described in the literature.