Successful Treatment of Hailey-Hailey Disease With Dupilumab.

Hailey-Hailey disease (HHD) is a rare autosomal dominant genodermatosis caused by mutations in the ATP2C1 gene, leading to impaired calcium homeostasis and epidermal acantholysis. Clinically, it manifests as recurrent, painful erosions in the intertriginous areas and is often resistant to conventional treatments, such as topical corticosteroids, antibiotics, and retinoids. This report describes the case of a 67-year-old woman with refractory HHD who presented with painful, pruritic erosions affecting the axillary, inguinal, and inframammary regions. Despite prior treatment with high-potency topical corticosteroids and oral retinoids, her symptoms persisted. Given the chronic and relapsing nature of HHD, dupilumab, an IL-4/IL-13 inhibitor, was initiated. The patient experienced significant symptomatic improvement within two months of therapy. This case contributes to the growing body of evidence supporting dupilumab as a potential therapeutic option for HHD and highlights the need for further research to evaluate its long-term efficacy and safety in managing this condition.