Alopecia Areata Mimicking Frontal Fibrosing Alopecia.

Alopecia areata (AA) is an autoimmune nonscarring alopecia that has variable clinical patterns, most commonly patchy disease. We report a case of AA with unusual involvement of the frontal hairline, mimicking frontal fibrosing alopecia (FFA), a form of scarring alopecia. Dermoscopic findings and response to treatment favored a diagnosis of AA. These findings highlight the major role of trichoscopy as well as the importance of including AA in the differential diagnosis for FFA.