Ureteral duplication is a congenital malformative uropathy that occurs most often in children. Complete ureteral duplication is defined by a kidney that has two ureters with two orifices that communicate to the bladder through two ureteral meati. It is an anatomical variant that remains rare. Its early discovery is due to a lack of diagnostic means, hence the occurrence of long-term complications. To this end, we observe an increased importance of the morbidity linked to the late diagnosis of this duplicity. Our objective was to show the importance of the morbidity linked to the late diagnosis of this anomaly, the incidence of the infection and the complications that this pathology poses as a problem. It was a clinical case of fortuitous discovery taken care of by a general surgeon in the general surgery department of the hospital "Mother Child" Le Luxembourg Bamako Mali. We report a case of complete ureteral duplication complicated by ureterohydronephrosis on a lithiasis wedged in the uretero-vesical junction of one of the left ureters in its lower portion which required a uretero-lithotomy with bladder reimplantation of the left ureters and secondly to a uretero-lithotomy with bladder reimplantation after two months. The postoperative course was simple.