Upadacitinib is effective in treating psoriasis combined with lichen planus: a case report

Psoriasis frequently coexists with other immune-mediated conditions such as arthritis, alopecia areata, vitiligo, and hidradenitis suppurativa, many of which remain challenging to manage. To date, there have been rarely reported cases of treating psoriasis combined with lichen planus. We report a case of coexisting psoriasis and lichen planus in a female patient. Despite initial efficacy with acitretin and topical mometasone, the patient self-discontinued treatment over safety concerns, prompting a relapse. Upadacitinib was subsequently initiated and yielded marked improvement within 3 months. By discussing the disease interplay and treatment rationale, this report seeks to inform clinical decision-making.