Less frequently associated HLA-class I-alleles which also confer susceptibility to psoriasis are HLA-C*07:01, HLA-C*07:02, HLA-C*12:02, HLA-C*07:04, HLA-B*27, and HLA-B*57 [9,10,11,12,13]. The gene discussed is HLA-B; the disease is psoriasis.