Retroperitoneal Mass Found in 43-Year-Old Patient

February 1, 2016
Cesar A. Moran, MD
Cesar A. Moran, MD

A 43-year-old man presents with a retroperitoneal mass, and a biopsy is performed. What is your diagnosis?

A 43-year-old man presents with a retroperitoneal mass, and a biopsy is performed.

What is your diagnosis?