title: Transitional cell papilloma of the ureter causing hydronephrosis in a child.
mesh_terms: D002648:Child; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D008297:Male; D010212:Papilloma / Q000150:complications*; D014516:Ureteral Neoplasms / Q000150:complications*