[Benign multilocular cystic nephroma]

A case of benign multilocular cystic nephroma in a young female is presented. The radiological features (urography, ultrasonography, computed tomography and angiography) are not specific for this diagnosis. The differential diagnosis includes a cystic Wilms' tumor in children and a cystic renal cell carcinoma in adults. The final diagnosis is obtained by histological examination of the resected specimen.