Leiomyoma of the urinary bladder: a case report

Leiomyoma of the urinary bladder is a rare tumor and constitutes 35% of benign mesenchymal bladder tumors. Herein, we report a case of leiomyoma of the bladder. A 32-year-old female was incidentally found to have an abnormal bladder mass on abdominal ultrasound during work-up for infertility. Bimanual examination then revealed a mass on the right side near the bladder neck area. On cystoscopic examination, an external compression mass covered with normal bladder mucosa could be seen at the right lateral wall. Computerized tomography revealed a homogeneous solitary tumor protruding into the urinary bladder from the right lateral wall without enlarged lymph nodes. Magnetic resonance imaging showed an intraluminal round mass at the right aspect of the urinary bladder, leading to suspicion of an intramural neurogenic or mesenchymal tumor. Surgical exploration was performed via a lower midline incision and a 5.0 x 4.5 x 2.2 cm mass was excised. The pathologic diagnosis was leiomyoma of the bladder. We discuss the diagnosis and management of leiomyoma of the bladder and briefly review the literature.