FSTL1 and gastric cancer: In recent years, some researchers have pointed out that immune-related genes [22], Follistatin-like 1 (FSTL1) [23], immune T cell subgroup [24], preoperative neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) may be significantly associated with the prognosis of gastric cancer [25, 26].