A review was made of 24 cases of renal oncocytoma seen between 1978 and 1989. There was considerable overlap between the clinical presentation of renal oncocytomas and renal carcinomas. Although pre-operative radiological, cytological and pathological investigations may suggest the presence of an oncocytoma, these studies cannot make a definitive diagnosis. We recommend that these tumours be treated as potential renal carcinomas until post-operative microscopic evaluation proves otherwise.
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