Quadruplication of the ureter in combination with a large ureteral cyst.Pediatr Surg Int. 2001 Sep; 17(7):566-8.PS
A newborn female was found to have a quadruplication of the ureter: four proximal, slim ureters opened into a large ureteral cyst and a distal monoureter opened into the bladder. Only five cases of ureteral quadruplication have been reported in the literature, one of which presented with identical pathology. These two cases may have been caused by similar, unidentified abnormal embryonic development.