STING1 and gastric cancer: Concerning STING expression, the DNA methylation level of STING was significantly lower in MSI-H GC compared to other subtypes of GC, including EBV (+) GC, suggesting that the low frequency of the DNA methylation of TMEM173 (STING) might be one of the regulatory mechanisms contributing to the high expression of STING in dMMR/MSI-H GC.