MAP2K4 and esophageal squamous cell carcinoma: Although none of the SNPs exceeded the significance level after correcting for multiple comparisons, at a reduced threshold of 0.001, rs1884361 (NRG3) was associated with ESCC risk, and rs9387033 (FYN), rs9788973 (MAP2K4), rs7187863 (PLCG2), and rs7720677 (PRLR) were associated with GC risk.