Dianna Ng, MD1, Walid Khalbuss, MD, PhD2, Laura Tabatabai, MD1
1Department of Pathology, University of California-San Francisco, San Francisco, California
2Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
Clinical History: The patient is a 48 year old woman who presents with a non-tender, firm, 4.1 cm parotid mass. Fine needle aspiration sampling is performed.
What is your diagnosis?