Figure 1A showed that compared to neutrophils from control or Non-AIC groups, neutrophils from AIC group released a great number of NETs, which could be specifically digested by DNase I. Furthermore, both serum and plasma NETs levels—which were evaluated by detecting the MPO–DNA complex—were significantly higher in GC patients experiencing AIC compared with those without AIC (control and Non-AIC groups). This evidence concerns the gene MPO and gastric cancer.