Briefly, the high expression of seven blood group antigen genes, i.e., FUT7, AQP1, P1, C4A, AQP3, KEL, and DARC, was significantly associated with good prognosis in six types of cancers, i.e., KIRC, HNSC, LUAD, CESC, SARC, MESO. This evidence concerns the gene KEL and cancer.