Duplex Collecting System

A duplex collecting system is a condition where a kidney has two separate drainage systems instead of one. This involves the urinary system, specifically the kidneys and ureters, which carry urine from the kidneys to the bladder. Having two collecting systems can sometimes cause problems like urinary tract infections, blockages, or urine flowing backward, which may affect kidney function. Many people with this condition have no symptoms and may not know they have it unless it is found during imaging tests. When symptoms occur, they often include pain, frequent infections, or urinary problems. The condition is usually present from birth and is a type of congenital urinary tract anomaly.

Duplex collecting system is a congenital anomaly characterized by the presence of two separate pelvicalyceal systems within a single kidney, each with its own ureter or a bifid ureter. This results from incomplete fusion or duplication of the ureteric bud during embryogenesis. The condition can be complete, with two ureters draining separately into the bladder, or incomplete, with ureters joining before entering the bladder. It is significant because it predisposes to complications such as vesicoureteral reflux, ureterocele formation, recurrent urinary tract infections, and obstructive uropathy. Diagnosis is important to prevent long-term renal damage. The anomaly is often unilateral but can be bilateral and is one of the most common congenital urinary tract malformations.