Senescent alopecia is a diffuse, non-scarring thinning, whereas FFA is a progressive, scarring alopecia with a distinct pattern of frontal hairline recession.
CCCA is a scarring alopecia that begins on the vertex of the scalp and spreads outwards, a different pattern than the frontal hairline recession of FFA.
Scalp DLE presents as discrete, scarred plaques with erythema and scale, unlike the band-like recession of the hairline in FFA.
This is a non-scarring thinning of the crown with preservation of the frontal hairline, the opposite pattern of FFA.
Hair loss from hypothyroidism is a diffuse, non-scarring thinning, not a patterned, scarring process like FFA.
This causes diffuse, non-scarring hair loss, which is reversible with supplementation, unlike the progressive, permanent loss in FFA.
FFA is considered a clinical variant of LPP, but classic LPP presents as multifocal patches of scarring alopecia with more prominent perifollicular erythema and scale.
MPHL involves bitemporal recession and vertex thinning, but it is a non-scarring process of miniaturization, whereas FFA is a scarring process with complete loss of follicles.
This is distinguished by a history of tight hairstyles and often has a "fringe" of retained short hairs along the hairline, which is not seen in FFA.
