Transitional cell papillary bladder neoplasm in a girl: an unusual presentation.

An 8-year-old girl presented with the clinical features of acute appendicitis. The removed appendix was normal but the abdominal pain persisted. There were no urinary symptoms and bacteriological examination of the urine was negative. An ultrasound scan showed an intravesical tumor that was subsequently excised. Histology showed a grade 1 transitional cell papillary bladder carcinoma of low grade malignancy. All previously reported cases have presented with urinary tract symptoms, usually hematuria.