Clinical and Trichoscopic Characteristics of Temporal Triangular Alopecia: A Multicenter Study

September 2016 in “ Journal of the American Academy of Dermatology ”

Pablo Fernández‐Crehuet, Sergio Vañó‐Galván, A. Martorell, Salvador Arias‐Santiago, Ramón Grimalt, F. Camacho‐Martínez

temporal triangular alopecia TTA vellus hairs non-scarring alopecia Down syndrome leukonychia sectorial hyperpigmentation of the iris woolly hair Dandy-Walker syndrome LEOPARD syndrome fine hairs non-scarring hair loss iris hyperpigmentation curly hair

TLDR Temporal triangular alopecia is a non-scarring hair loss in children, often linked to other health conditions.

The study focused on temporal triangular alopecia (TTA), a congenital, non-scarring alopecia that appears as a hairless patch in the frontotemporal region of the scalp, typically in children aged 3 to 6. TTA is characterized by the presence of fine vellus hairs and lacks underlying skin changes. It has been linked to various conditions, including Down syndrome, leukonychia, sectorial hyperpigmentation of the iris, woolly hair, mental retardation, epilepsy, and malformations like Dandy-Walker and LEOPARD syndromes.

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research Trichoscopy for Common Hair Loss Diseases: Algorithmic Method for Diagnosis

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