Congenital triangular alopecia

Congenital triangular alopecia, also called temporal triangular alopecia, is a localised patch of non-scarring hair loss most often found near the temple. It may be present from early childhood or noticed later. The patch is typically stable, smooth and not inflamed. It can be mistaken for alopecia areata, but trichoscopy usually shows many fine vellus hairs rather than active inflammatory signs. Treatment is often unnecessary, although hair transplantation has been reported for cosmetic correction in selected cases.