The leading similar condition was BP (n = 45; 66.2%), followed by linear IgA bullous dermatosis (LABD; n = 5; 7.4%) (9, 11–14), epidermolysis bullosa acquisita (EBA; n = 3; 4.4%) (15–17), dermatitis herpetiformis (DH; n = 3; 4.4%) (18–20), mucous membrane pemphigoid (n = 3; 4.4%) (21–23), and others (Table 2). This evidence concerns the gene CD79A and dermatitis herpetiformis.