To improve the diagnostic and predictive performance of GC patients, we constructed a nomogram based on 8 genes with diagnostic values (ARHGAP21, ETV7, KRR1, LCOR, MTFR1, PARD6G, UBE2D1, and VPS26A) via logistic regression analysis (Figure 6A). This evidence concerns the gene ARHGAP21 and gastric cancer.