PDCD1LG2 and acute leukemia: Since we have evaluated whether there is a correlation between IHC results and survival of patients, there was no significance between PD-1/PD-L2 expression rates and MM (P = 0.691/P = 0.546) and acute leukemia (P = 0.552/P = 0.273) and CLL (P = 0.319/P = 0.199) (Table 3).