IL17F and gastric cancer: Moreover, the Human Protein Atlas Project indicates that high expression of IL-17RA is a favorable prognostic marker for survival in gastric cancer patients.30–32 There is also evidence that several polymorphisms in the IL17A gene (rs2275913G>A OR = 2.21, 95% CI = 1.29-3.79)33 and the Il17F gene (rs763780C>T OR = 1.35, 95% CI = 1.16–1.58)34 influence susceptibility to gastric cancer.35,36