Temporal Triangular Alopecia: Clinical and Dermoscopic Features of a Rare Entity

Temporal triangular alopecia (TTA) is a rare, benign condition affecting approximately 0.11% of the population, often appearing between ages 2 and 9. It is characterized by a triangular, non-scarring alopecic patch, typically in the left frontotemporal region, as seen in an 18-year-old female case. TTA is usually unilateral and non-progressive, diagnosed clinically with trichoscopic features like vellus hairs and empty follicles. Misdiagnosis with other alopecias is common, leading to unnecessary treatments. There is no effective pharmacological treatment, but surgical options and minoxidil may help. In this case, treatment was not pursued due to the condition's non-progressive nature and lack of impact on quality of life.