Four SNPs with the position ability to bind to the seed sequences of miRNAs, rs887796, rs1468488 of IL-17RA (Interleukin 17 Receptor A), rs10889677 of IL-23R (Interleukin 23 Receptor), and rs3748067 of IL-17A (Interleukin 17A) were genotyped with the restriction enzymes method, in 500 cancer-free subjects and 500 gastric cancer patients, in which gastric cancer was recently diagnosed by the histopathological methods [30]. This evidence concerns the gene IL17A and gastric cancer.