[Inverted papilloma associated with transitional cell carcinoma in the upper urinary tract: report of one case and review of the literature].

Inverted papilloma of the pelvis and the ureter is a rather uncommon (only 40 cases in the relevant literature) benign epithelial tumor, occasionally harboring foci of malignancy. Since it does not metastasize, a conservative treatment is advisable, but a strict follow up is always required. The Authors report a case of inverted papilloma of the ureter near which an area of transitional carcinoma was discovered.