A 29-year-old man with a slow-growing painless 1.5 cm purplish nodule of his left distal forearm.

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Source: Department of Pathology, Creighton University Medical Center, Omaha, NE

Photo: Wang B, Santos E, Sarma D

Discussion: Wang B, Santos E, Sarma D

Reviewed by: Wang B, Santos E, Sarma D