CD8A and lymphoma: To further explore the possible mechanism(s) for accumulation of Grail−/− CD8+ T cells in the EG-7 model of lymphoma, next we analysed the susceptibility of WT and Grail−/− CD8+ TILs to apoptosis; however, we did not detect any difference in the percentage of apoptotic markers Annexin V and 7AAD in CD8+ TIL between WT and Grail−/− groups on days 7 and 12 after tumour inoculation.