Renal oncocytoma: the incidence of 18 surgical and 12 autopsy cases.
The material of 562 surgically removed renal cell carcinomas or adenomas was reviewed, and 18 tumors were diagnosed as renal oncocytomas. The incidence seemed to increase strikingly during recent years. Similarly, among 112 renal cell tumours from 8489 autopsies, 12 oncocytomas were found. Immunoperoxidase staining for alpha-I-antichymotrypsin was positive in all the tumours studied speaking for the origin from proximal tubular cells. All the tumours behaved in a benign fashion despite the large size and/or moderate histological atypia. The recognition of renal oncocytoma is urged, because its incidence seems to be increasing, and the prognosis is much better than that of renal cell carcinoma.
D000236:Adenoma / Q000473:pathology* / Q000601:surgery; D001344:Autopsy; D002292:Carcinoma, Renal Cell / Q000473:pathology* / Q000601:surgery; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D007680:Kidney Neoplasms / Q000473:pathology* / Q000601:surgery