CD8A and acute lymphoblastic leukemia: ,25 In this study, the B-ALL samples had central memory T cells with a median of 76% (range, 60%–88%) among CD4 and 66% (range, 21%–80%) among CD8 compared with the DLBCL 74% (range, 54%–79%) in CD4 and 41% (range, 20%–67%) in CD8.