For lung adenocarcinoma and endometrial carcinoma, we observed a cross-cancer effect for KRAS/NRAS-mutated cases as ATM levels are decreased, and MAPK_pT202_Y204, Claudin-7, S6_pS235_S236, and MEK1_pS217_S221 are increased in both histological tumor types consistently. This evidence concerns the gene NRAS and endometrial carcinoma.