We wondered whether differences that were noticed in HLA gene-expression assays correlated with previous immunohistochemical staining results on tumor cells and observed that the gene-expression of HLA-A and -B was significantly correlated with the percentage of tumor cells being, respectively, positive for HCA2 (HLA-A) and HC10 (HLA-B/C) (Table 1). The gene discussed is HLA-B; the disease is neoplasm.