[Inverted papilloma of the ureter. Review and treatment criteria]

We report a case of inverted papilloma of the ureter, a rare disease entity. To our knowledge, this makes the 22nd case reported in the literature. Patient anatomopathologic work up included electron microscopy and immunohistochemical methods. This condition is compared to urothelial tumours of the ureter and we discuss the therapeutic approach. Correct treatment is by tumor excision including its base by segmental resection of the ureter and end-to-end ureterorrhaphy or ureterocystoneostomy in tumors of the lower third. A case submitted to endoscopic resection with good clinical results has been recently described by Cabezas Zamora. Perioperative biopsy does not appear to provide more data relative to the surgical option. Like other authors, we believe that these warrant the same close follow-up as in urothelioma.