Brought to you by the Society of Gynecologic Surgeons. The objective of this video is to discuss the presentation, evaluation, and treatment of duplicated urinary collecting systems, and to present a case of duplicated collecting system with ectopic ureteral implantation at the vaginal introitus. In this video, the authors detail the single-port robot-assisted laparoscopic and vaginal excision of the patient’s distal ectopic ureter. Duplicated urinary collecting systems are the most common birth defect related to the urinary tract and can be frequently encountered by the pelvic surgeon. Knowledge of the presentation and workup of suspected duplicated collecting system is important in carrying out appropriate treatment.