Although the reported clinical and immunological features of DPP4i-BP vary among studies (25–30), a specific group of patients with DPP4i-BP primarily has anti-BP180, non-NC16A autoantibodies, manifesting a “noninflammatory” phenotype that exhibits less erythema than in typical BP (13, 30–32). The gene discussed is COL17A1; the disease is Erythema.