A 23 year-old man with a 1 year history of multiple (15) painful papules in dermatomal distribution on his shoulder

    A biopsy of a papule from a 23 year-old man with a 1 year history of multiple (15) painful skin-colored lesion in dermatomal distribution on his shoulder.

    The consultation was requested to assess importance of mitotic activity in this lesion.

     

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