[HLA-DRw7 in psoriasis vulgaris]

40 unrelated patients with Psoriasis vulgaris were studied for their HLA-A, B and DRw antigen phenotypes. All underwent a skin biopsy to confirm diagnosis. Like most of the authors, we observed an increase in B13 and B17 antigens (17,50 and 25%) whereas in the healthy population the percentage was (5 and 6,02%) respectively. The strong increase in DRw7 suggests that psoriasis vulgaris was associated with DRw7 antigens, with an unbalanced linkage between the B13 and DRw7 antigens and between the B17 and DRw7 antigens.