Background: Alopecia areata-like hair loss may occur in the context of cutaneous T cell lymphoma (CTCL) and can very rarely evolve to alopecia universalis-like presentation. The dermoscopic findings of CTCL-related alopecia have not been described.
Methods: Two patients with alopecia areata universalis-like hair loss occurring in the context of preexisting, pathology-proven CTCL are presented.
Results: Clinical examination showed subtotal scalp alopecia with sparse fine hair or total scalp alopecia with loss of eyebrows, eyelashes and body hair. On dermoscopy there was follicular or diffuse scaling, reduced number of follicular openings with broken hairs, short hairs or keratotic filiform spicules. Pathology confirmed the diagnosis of CTCL-related alopecia. One patient had almost complete hair regrowth after treatment.
Conclusion: CTCL-related alopecia universalis is a rare non-scarring form of hair loss which simulates alopecia areata universalis. We provide clues to distinguish both based on clinical, dermoscopic and pathologic findings.