Kidney oncocytoma.

Authors review the case history of three patients with kidney tumours which had been surgically removed. In two of the cases radical nephrectomy while in one, organ-preserving surgery was performed. In all the cases histology revealed benign kidney tumours--oncocytomas. In light of the available literature authors indicate that preoperative diagnosis is almost impossible. Furthermore, it is their opinion that this benign kidney tumour has a less frequent occurrence than earlier thought.