HLA-A and Arthritis: Risk alleles for specific clinical manifestations or phenotypes may vary; for example, a Korean study identified HLA-A*02:07 as a risk allele for skin lesions and arthritis, and HLA-A*26:01, HLA-A*30:04, and HLA-B*51:01 as risk alleles for uveitis, vasculitis, and BD, respectively25.