Renal oncocytoma: new observations.

Publisher Website
Google Scholar
Abstract
Renal oncocytomas are uncommon, benign tumors that can be treated by local excision or heminephrectomy; their preoperative differentiation from renal cell carcinoma, treated by radical nephrectomy, would be invaluable. A particularly important finding, a central scar not stressed in previous reports, is frequently demonstrated by CT [computed tomography] examination. Radiographic studies of 18 pathologically confirmed cases of oncocytoma were evaluated and compared with results of CT, sonography and angiography studies of 18 renal cell carcinoma cases. Oncocytomas can be suggested if a stellate scar is identified within an otherwise homogeneous tumor on ultrasound (US) and CT; if the mass appears homogeneous but no scar is present, angiography should be performed. An oncocytoma can be suggested in these cases if a spoke-wheel configuration and homogeneous blush are present. These criteria, which are reliable only if the mass is 3 cm or larger, would have resulted in the correct diagnosis of oncocoytoma in 16/18 cases.