RESUMEN
Triplication of the ureter is rare, with less than 100 cases reported. A case of isolated of ureteral triplication is documented in a 19-year-old white man with a history of multiple episodes of upper urinary tract infection. After through physical examination and imaging studies, including ultrasonography, voiding cystography and intravenous urogram, a triple ureter was identified in the left side. The left kidney was atrophic and considered non-functional. The patient did not have any other urogenital anomaly. A nephroureterectomy was successfully performed and at 4 month follow-up the patient is asymptomatic. Ureteric duplication and triplication have been explained by multiple ureteric buds arising idependently from the Wolffian duct, and/or early fusion of one or more ureteral buds. The case herein reported, probably represents Smith's type III triplication