TEMPORAL TRIANGULAR ALOPECIA

By Gary M. White, MD

temporal triangular alopecia


Temporal triangular alopecia (TTA) is the loss of hair over the frontotemporal scalp.

Clinical

A triangular, oval or lancet-shaped patch of non-scarring alopecia is seen. The affected areas are devoid of terminal hair but do contain vellus hairs. The skin is normal. The condition is asymptomatic and remains stable throughout life. Dermoscopy shows normal follicular openings with vellus hairs surrounded by terminal hairs on the outskirts of the lesion. There is an absence of yellow and/or black dots, brittle hair and ‘exclamation mark’ hairs, helping exclude alopecia areata, trichotillomania, traction alopecia and congenital aplasia cutis.

Treatment

No treatment is needed nor known. Usually, the surrounding hair may be made to cover the area. Topical minoxidil has been reported. In extreme cases, excision or hair transplant may be done.

Additional Pictures

temporal triangular alopecia

References

Giant TTA. Int J Trichol 2012;4:51-2

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