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The kidney is a common site for congenital anomalies which may be responsible for considerable morbidity among young patients. Radiological investigations play a central role in diagnosing these anomalies with the screening ultrasonography being commonly used as a preliminary diagnostic study. Intravenous urography can be used to specifically identify an area of obstruction and to determine the presence of duplex collecting systems and a ureterocele. Computed tomography and magnetic resonance (MR) imaging are unsuitable for general screening but provide superb anatomic detail and added diagnostic specificity. A sound knowledge of the anatomical details and familiarity with these anomalies is essential for correct diagnosis and appropriate management so as to avoid the high rate of morbidity associated with these malformations.