HLA-antigens and psoriasiform napkin dermatitis.

HLA typing was performed in 14 patients with psoriasiform napkin dermatitis (PND). Only 2 patients carried one of the three antigens (HLA-B13, B17, Bw37) associated with psoriasis vulgaris. The frequency of these antigens in PND corresponds to that in healthy controls, but differs significantly (p less than 0.01) from that in a population of psoriatics. Our results indicate that patients with PND are not true psoriatics, and that PND and psoriasis are different etiological entities.