pediatrics
Renal Anomalies
Duplication anomalies
Supernumerary collecting systems may be unilateral or bilateral and may involve the renal pelvis and ureters (accessory renal pelvis, double or triple pelvis and ureter), calyx, or ureteral orifice. Duplex kidneys have a single renal unit with more than one collecting system. This anomaly differs from fused kidneys, which involves fusion of two renal parenchymal units maintaining their respective individual collecting systems. Some duplication anomalies have ureteral ectopy with or without Ureterocele and/or Management depends on the anatomy and function of each separately drained segment. Surgery may be necessary to correct obstruction or VUR. 