Benign ureteral tumors. Four case reports and a review of the literature.

The diagnosis of benign ureteral polyps should be considered especially in patients younger than 40 years with filling defects of the proximal ureter on the intravenous pyelogram (IVP). The excellent results of conservative organ-saving surgery (open resection, ureteroscopic resection, laser coagulation) require precise diagnostic management preoperatively in these patients.