[A case of paraganglioma of the urinary bladder].

Herein we report a case of primary paraganglioma of the urinary bladder. A 21-year-old woman was admitted to an emergency hospital, because of gross hematuria, dysuria and complete urinary retention. Pelvic CT scan and ultrasonic examination revealed a bladder tumor and coagulated blood mass, then she was referred to our clinic for further treatment. On cystoscopy a dark brown lobular tumor was seen on the anterior wall. The bladder tumor was removed by partial cystectomy. The operative specimen measured 6 X 4 X 3 cm and weighed 50 g. Histological examination showed it to be a paraganglioma of the urinary bladder, which was chromaffin positive. Her serum and urinary catecholamine level were within the normal range after operation. She is now ten months postoperative, free from hematuria, and showing no other symptoms or signs of disease including metastasis.