1. Presented by George Netto, M.D. and prepared by ChanJuan Shi, M.D., Ph.D.

A 73 year old man was found to have a 4.5 cm right adrenal mass during a work up for a recent sharp flank pain. A prior history of a remote left radical nephrectomy was given. On immunohistochemistry, the tumor is negative for S100, CK7, CK20, Melan A, Chromogranin and Synaptophysin.

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