Fig. 2From: A back-to-back tumor composed of papillary renal cell carcinoma and oncocytoma treated by laparoscopic partial nephrectomy: a case reportGrossly, the mass was divided into two small masses (right and left). The oncocytoma (left) was a tan, homogeneous, white yellowish mass with a central scar. The papillary renal cell carcinoma (right) was well circumscribed with a pseudocapsule, a dark brown color, and a spherical boundaryBack to article page