This is a picture of a fungal granuloma, a large, red (erythematous) patch (plaque) with a prominent border. Within the borders of the lesion are scattered blisters (pustules) that indicate deeper involvement of hair follicles (Majocchi's granuloma). This dermatophyte infection was caused by Trichophyton rubrum.
Review Date 10/24/2016
Updated by: David L. Swanson, MD, Vice Chair of Medical Dermatology, Associate Professor of Dermatology, Mayo Medical School, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.