Case 13

Authors: Ritu Nayar, M.D; Northwestern University, Pathology, Chicago, IL, USA, and Walid E. Khalbuss, M.D., Ph.D., University of Pittsburgh, Pittsburgh, PA, USA.

A 49 year old man presented with this FDG-avid, solid thyroid nodule. An US-guided FNA was performed.

The most likely diagnosis of this case?