CEACAM5 and neoplasm: Its low expression level was found to be significantly related to ECOG performance status 1, diabetic patients, ILC, stage IV, the presence of metastasis, widespread metastasis, the tumor grade III, the pathological tumor status T3, the pathological node status N3, the triple-negative subtypes, relapsed cases, died cases and cases with high CEA and CA15-3 levels.