In Chen's gastric dataset [29], CBX1 was found to be upregulated in diffuse gastric adenocarcinoma (fold − change = 1.516 and P = 2.83E − 08), gastric mixed adenocarcinoma (fold − change = 1.66 and P = 2.25E − 6), gastric intestinal-type adenocarcinoma (fold − change = 1.613 and P = 2.38E − 13). The gene discussed is CBX1; the disease is diffuse gastric adenocarcinoma.