Renal oncocytoma. A report of 3 cases

Three cases of renal oncocytoma are presented; all were in women and involved the lower pole of the kidney. The patients presented with renal masses, but haematuria was not a feature. Unexplained monocytosis was found in 2 cases. Ultrasound investigations and intravenous pyelography gave non-specific results and the diagnoses were made on the basis of the histopathological findings.