Oncocytoma
Section Editor: Dharam M. Ramnani, MD
Virginia Urology, Richmond, VA, USA
Image Description
Renal oncocytoma is a benign renal neoplasm that makes up 6% to 9% of all renal tumors. It is usually asymptomatic and is most often discovered incidentally on imaging studies performed for unrelated conditions. The tumor is usually well-circumscribed but not encapsulated. It has characteristic mahogany brown or yellow-brown color. A prominent central stellate scar is seen in about 30% of cases, usually in larger tumors. Image courtesy of Steve O'Connor, MD, Houston, Texas. Used with permission