220px<unk>  or Duplex Collecting System is a congenital condition in which the ureteric bud, the embryological origin of the ureter, splits (or arises twice), resulting in two ureters draining a single kidney. It is the most common renal abnormality, occurring in approximately 1% of the population.
Duplicated ureter
Ectopic ureter
Ectopic kidney
Crossed renal ectopia
Pelvic kidney
Ureteric stricture
Urethral caruncle
Multicystic dysplastic kidney