IL23A and psoriasis vulgaris: We previously presented the transcriptomic analysis of skin biopsies of two patients with BLP that revealed large overlaps with psoriasis vulgaris and also suggested some potential differentiators.8 Here we report the clinical cases of these two patients, both negative for HLA-C*06:02, and their response to anti-IL-23p19 therapy, suggesting activation of the IL-23/IL-17 pathway in BLP.