Successful treatment of airborne allergic dermatitis to sesquiterpene lactone with upadacitinib: A case report.

This case report describes, to our knowledge, the first known successful treatment of airborne allergic contact dermatitis to sesquiterpene lactone with upadacitinib in an adult patient. Recurrent summertime photodistributed eczematous eruptions should raise suspicion for airborne allergic contact dermatitis to sesquiterpene lactone, and positive patch test results to sesquiterpene lactone and Compositae in these patients should be considered highly relevant. In addition to allergen avoidance, treatment with systemic Janus kinase inhibitors can induce allergic contact dermatitis remission. Our patient did not respond to allergen avoidance or topical corticosteroids; however, he achieved almost complete resolution of his allergic contact dermatitis with a 6-week course of upadacitinib, a Janus kinase 1 inhibitor.