The second group, of subepidermal bullous dermatoses, is mainly represented by bullous pemphigoid (BP) and epidermolysis bullosa acquisita (EBA), followed by less common conditions, such as linear IgA bullous dermatosis (LAD), dermatitis herpetiformis (DH), mucous membrane pemphigoid (MMP) and bullous systemic lupus erythematosus (BSLE). This evidence concerns the gene CD79A and autoimmune bullous skin disease.