[Oncocytoma of the kidney and oncocytic adenocarcinoma. 10 cases of oncocytoma].

Having studied 484 previously reported and 10 personal cases of oncocytomas we believe that the main controversies surrounding this tumor are related to the fact that the term oncocytoma is wrongly applied to all tumors with oncocytic cells. The term oncocytoma must be restricted to well encapsulated tumors, sometimes very large ones, made up solely from regular oncocytic cells. The benign clinical behavior of oncocytomas thus defined, is supported by numerous well documented observations in medical literature. Thanks to the progress made in radiology investigations and to better defined histological criteria, it is possible, by means of diagnosis with frozen sections, to practice partial surgery.