Sar–Pomian M, et al. – This investigation gauged the value of trichoscopy in the differential diagnosis of pemphigus vulgaris, pemphigus foliaceus, bullous pemphigoid and dermatitis herpetiformis. It was reported that autoimmune bullous diseases displayed characteristic trichoscopic patterns. This tool could serve as a rapid in–office preliminary diagnostic method in the differential diagnosis of such diseases.