Background
Trichomycosis axillaris is a relatively common superficial corynebacterial colonization of the axillary hair shafts characterized by the presence of adherent granular concretions and a benign clinical course. When the pubic hair is affected, the condition is referred to as trichomycosis pubis.
Shelley and Shelley noted the coexistence of erythrasma, trichomycosis axillaris, and pitted keratolysis and termed it the corynebacterial triad.