Inverted papilloma of the ureteropelvic junction: case report and review of the literature

The authors report the fourth case of inverted papilloma of the ureteropelv ic junction since the first description of this lesion in 1963 by Potts and Hirst. In view of the rarity of this lesion and its unusual presentation, they conducted an exhaustive review of the literature concerning inverted p apillomas of the upper urinary tract. This proliferative lesion of the urot helium can precede, accompany or follow superficial or invasive urothelial tumours. Rigorous treatment and surveillance are therefore justified to det ect an associated tumour. The controversy concerning the benign nature of i nverted papilloma has still not been clarified.