Granuloma Annulare – Perforating Type

February 1st, 2011

Perforating Granuloma Annulare is a rare form of Granuloma Annulare which I occasionally encounter in my The Woodlands dermatology and Conroe dermatology offices.  Clinically, Perforating Granuloma Annulare appears as red papules with a keratotic core extruding from the center of each lesion.  Essentially, the degenerated collagen in the dermis is being extruded through the epidermis and appears as a keratotic core.