CEACAM5 and neoplasm: The sample was obtained from the patient's serum and the examined routine blood test (hemoglobin, leukocyte, platelets), hemostasis (fibrinogen and D-dimers), blood chemistry test (aspartate transaminase [AST], alanine transaminase [ALT], albumin, urea, creatinine, and blood glucose), electrolyte (sodium, potassium, chloride, and calcium) and tumor markers (carcinoembryonic antigen [CEA] and Cyfra 21-1).