Inverted papilloma of the urinary bladder in a girl

We report a case of inverted papilloma of the urinary bladder in a 10-year-old girl. She was referred to us with intermittent asymptomatic gross hematuria. A polypoid, pedunculated mass, which had a thin and long stalk, approximately 6 x 20 mm in diameter, was observed by cystscopic examination at the right paratrigone. The lesion was resected endoscopically. Histological findings were compatible with the trabecular type of inverted papilloma. There have been only 3 cases reported of inverted papilloma in children, and no report has previously been published concerning a girl. Since the biological potential of pediatric inverted papilloma remains unclear, we believe that our patient should undergo periodic and detailed urological examinations.