perforating granuloma annulare
Histologic Features
- A perforating site of the epidermis showing focal degenerated collagen protruding through a defect in the epidermis
- An infiltration of histiocytes between collagen bundles and around degenerated foci of the collagen
- A lymphocytic infiltrate around the blood vessels
Updated Wednesday, July 31, 2013 8:30:48 PM