OBJECTIVES: To determine the mostfrequent causes of ureteral injury, and the way to correctsevere damage of the ureter.METHODS: We reviewed the medical records of 25patients who suffered ureteral injuries during abdominalor pelvic surgery in a five-year period; endoscopic injurieswere excluded.RESULTS: The most common presentation includedpain, urinary incontinence and fever. Hysterectomy wasthe most frequent operation causing ureteral injuries. Thediagnosis was made by intravenous urography andultrasound. Ureteral reimplantation using a Boari’s flap,without other complications, was the preferred treatmentdue to ureteral damage. Right side and distal third of theureter where the most frequently affected sites.CONCLUSIONS: In cases of iatrogenic injuries of thedistal third of the ureter with severe lesions, ureteralreimplantation with a Boari’s flap may be the option.