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.

 

Associations
Dermpedia textbook chapter: