Date of Presentation:12/10/2021

Attending pathologist: Anil V. Parwani, MD, PhD, MBA

Presented by: Saba Shafi, MD

Prepared by: Saba Shafi, MD

Organ:Kidney

HISTORY:

A 72-year-old female who presents in consultation for incidental left renal mass. CT scan shows an enhancing left renal mass with a central stellate scar. Thus, both RCC and oncocytoma on the differential. Complicating this is a possible new diagnosis of cirrhosis, with signs of liver nodularity and portal hypertension detected on the referring CT scan. The patient also has incidental colonic thickening. A renal biopsy was done for the renal mass.

GROSS:

What is the most likely diagnosis?

  1. Oncocytic papillary RCC
  2. Eosinophilic clear cell RCC
  3. Eosinophilic variant of chromophobe RCC
  4. Oncocytoma
Oncocytoma