CD79A and Vitamin B3 deficiency: Cutaneous and mucous membranes:− Dermatitis herpetiformis− Atopic dermatitis− Pemphigus− Linear IgA bullous dermatosis− Chronic urticaria− Psoriasis− Vitiligo− Rosacea− Pellagra− Hereditary angioneurotic edema− Vasculitis− Nodosum/necrolytic migratory erythema− Behçet’s disease− Dermatomyositis− Oral lichen planus− Hypertrichosis− Damage to the dentition (delayed tooth eruption, mineralization defects, dental caries)− Lesions of the oral mucosa (recurrent canker sores, ulcers, erythema, cheilitis, atrophic glossitis)− Dryness and burning sensation of the tongue