Polymorphisms: GSTO2*N142D (A424G; rs 156697)Main findings: - no association between GSTO2*N142D variant and gastric cancer risk;- increased risk of gastric cancer in subjects with history of cancer in their first-degree relatives and with homozygous wild-type GSTO2*N142 (N/N) genotype. This evidence concerns the gene GSTO2 and cancer.