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Ureteral Duplication

Ureteral duplication, also known as a duplex collecting system, refers to the presence of two ureters draining a single kidney.  Each ureter may independently drain into the bladder or they may connect on the way down and drain as a single ureter into the bladder.  This can occur on one or both sides and is considered a normal variant.  No treatment is required if ureteral duplication is the only finding.  Some children with ureteral duplications can have a ureterocele, vesicoureteral reflux, or one may insert into an abnormal location (ectopic ureter).   In these cases, certain investigations, medical treatments, or even surgery may be needed.