Excerpt from Trichomycosis Axillaris

Synonyms, Key Words, and Related Terms: trichomycosis nodosa, lepothrix

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Background

Trichomycosis axillaris is a relatively common superficial bacterial colonization of the axillary hair shafts. Granular concretions, which are yellow, black, or red, adhere to the hair shaft and clinically characterize this condition.

Pathophysiology

Trichomycosis axillaris results from corynebacterial overgrowth on hair shafts in moist regions of the body and predominantly affects axillary hair, and to a lesser extent, pubic hair (trichomycosis pubis).

Frequency

United States

No studies have assessed the frequency of the condition in the United States.

International

In one study from the United Kingdom, trichomycosis axillaris was present in 27% of adult male students, and in the general population, 42% of male patients and 7% of female patients.

Mortality/Morbidity

Trichomycosis axillaris is a benign disease with no associated mortality or complications.

Race

No racial predilection is reported.

Sex

Both sexes may be affected; however, the disease appears to affect males more commonly, since most women shave their axillary hair.

Age

Trichomycosis axillaris can affect any age group from puberty through adulthood.

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