1. Presented by George Netto, M.D. and prepared by Amy Duffield, M.D., Ph.D.

A 76 years old man presented with a 9 cm left groin mass. On immunostains, the tumor was diffusely positive for Muscle specific actin, Smooth Muscle Actin and Desmin, Focally positive for CD34 and Cytokeratin Cam5.2.

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