Linear immunoglobulin A (IgA) bullous dermatosis (LABD, ORPHA: 46488) is a rare autoimmune subepithelial vesiculobullous disease caused by IgA autoantibodies directed against different antigens of the basement membrane zone (BMZ) of the skin and/or mucosae [1, 2]. The gene discussed is CD79A; the disease is autoimmune bullous skin disease.