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Case 47

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.

Papanicolaou Stain

Romanowsky Stain

What is your diagnosis?