IFNG and colorectal carcinoma: Compared to the control group, the percentage of intracellular interferon (IFN)-γ+ NK cells was significantly reduced in the CRC group (89.5 [78.6–94.6] vs. 94.9 [91.3–96.8], P < 0.001) and was accompanied by a decrease in the median fluorescence intensity (MFI) of IFN-γ+ NK cells (13,666.5 [8928.8–20,436.8] vs. 17,767.3 [13001.0–22,423.1], P = 0.001).