Trichoscopic findings in folliculotropic mycosis fungoides: case report

Folliculotropic mycosis fungoides (FMF) accounts for 10% of mycosis fungoides cases, with alopecia being a characteristic feature. This case report details a 50-year-old man with FMF stage IB, exhibiting erythematous patches, plaques, madarosis, and patchy scalp alopecia. Trichoscopy showed decreased pilosebaceous units, dilated follicular openings, black dots, vellus, and dystrophic hairs, alongside white scaling and unique vascular patterns on the scalp. The literature suggests that while some trichoscopic findings like dilated follicular openings and black dots are less common in FMF, dystrophic hairs are prevalent in advanced stages. Trichoscopic evaluation could aid in differential diagnosis and determining when to biopsy for early disease detection.