Clinicopathologic Observation of Temporal Triangular Alopecia
March 2012
in “
Journal of The American Academy of Dermatology
”
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Studysummary This study found that white females with female pattern hair loss had higher hair density in the occipital scalp area, while Asian females had thicker hair diameters in both frontal and occipital areas. Our plain-language summary of this paper — not a Tressless recommendation.
In a study conducted from 2000 to 2011, researchers observed the clinical and histopathologic features of temporal triangular alopecia (TTA) in 12 Korean patients, with an average age of onset at 9 years old and no sexual predilection. Most cases of TTA, which is characterized by triangular or oval hairless patches on the frontotemporal suture line, developed between ages 2 and 3, leading to speculation that TTA may be congenital. The hairless patches were typically skin-colored without signs of inflammation, scarring, hypopigmentation, or verrucous changes. Histopathologically, the affected areas had a few vellus hairs and no terminal hair, with hair follicles present but smaller than normal. Out of the 12 patients, 7 were treated with topical Minoxidil solution, but only 2 showed mild improvement, while the others saw no progression or improvement during the follow-up period.
