Large spectrum of complete urinary collecting system duplication exemplified by cases. Pictorial essay.

Urinary collecting system duplication is a congenital anomaly and can associate various types of urinary tract pathologies. Authors will illustrate by cases some of associated anomalies such as ureterocele, extravesical ectopic ureter, vesicoureteral reflux or reflux nephropathy; one case presented an association between posterior urethral valve and bilateral collecting system duplication.