TAK is associated with major histocompatibility (MHC) class I alleles, human leukocyte antigen (HLA)-A24 and B52 [23, 24], while GCA is associated with MHC class II alleles, HLA-DR4 [25, 26], suggesting that TAK may be associated with activation of CD8+ T cells. Here, CD8A is linked to temporal arteritis.