title: Transitional cell papilloma of the bladder.
abstract: Bladder tumors of epithelial origin are rare in children. A 7-year-old male presented with intermittent painless hematuria. An ultrasound examination of the bladder revealed a single polypoid mass which proved to be a transitional cell papilloma.
mesh_terms: D000293:Adolescent; D006801:Humans; D008297:Male; D010212:Papilloma / Q000175:diagnosis*; D014463:Ultrasonography; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis*