[Inverted papilloma of the ureter. Apropos of a case].

Presentation of one case of inverted papilloma of the renal pelvis, an uncommon entity with very few cases described in the international literature. The pathoanatomic presentation is that of a benign tumour, which would provide an option for conservative therapy through segmentary resection and termino-terminal anastomosis. Due to its low frequency, pre-operative diagnosis of this tumour is difficult, although the number of diagnosis could be increased with the use of endourologic techniques. In spite of the benign nature, it can be multifocal and relapsing. A close follow-up monitoring is recommended.