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a Extensive area of cicatricial alopecia with erythema and erosions. b Direct immunofluorescence with salt-split test of the scalp positive for IgG antibody on the epidermal side of the blister. c, d Cicatricial lesions with milia formation on the dorsum of the hands and on the knees. e Direct immunofluorescence with salt-split test of the knee skin positive for IgG antibody on the dermal side of the blister.
