On Cox regression analysis, histologicalgrade, preoperative CK20 in peripheral blood, postoperative CK20 in peripheral blood, andlymph node status by H&E staining, pan-CK expression by IHC, and CK20 mRNA expressionby qPCR were independently associated with survival of patients with GC (Table 6). The gene discussed is KRT20; the disease is gastric cancer.