Trichomycosis axillaris: Case report

Trichomycosis axillaris is a bacterial infection commonly caused by Corynebacterium. This condition usually affects the axillary and pubic hair, but it also can be seen on the scalp. It may have three different presentations: trichomycosis flava, rubra and nigra; it is characterized by the presence of concretions around the hair. Despite it is not uncommon, doctors outside of dermatology underdiagnosis this condition of the skin. Herein, we report a 70-year-old male patient, who visited the clinic for a post-lesional melanoderma affecting the right armpit. During the physical examination he was found to have a trichopathy localized at the axillary hair, consisting of multiple yellow axillary hairs. Dermoscopy and microscopy showed sheath and nodules around the hair. With these clinical features the patient was diagnosed with post-lesional melanoderma and axillary trichomycosis. Key words: Hair diseases, Corynebacterium infections, Corynebacterium