|Poll|October 13, 2014

27-Year-Old Man Presents With an Anterior Mediastinal Mass

A 27-year-old man is found to have an anterior mediastinal mass. A biopsy of the mass is performed. What is your diagnosis?

A 27-year-old man is found to have an anterior mediastinal mass. A biopsy of the mass is performed, and the histology image is shown below.

What is your diagnosis?

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