For STAD, grade was significantly correlated with PTPN3, PTPN11, PTPN13, PTPN14, and PTPN18 (P = 0.015, 0.021, 0.005, 0.002 and 0.034, resp.; Additional file 1: Table S3). This evidence concerns the gene PTPN3 and gastric adenocarcinoma.