CEACAM5 and neoplasm: Traditional tumor markers will be examined, including carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA-125), carbohydrate antigen 199 (CA-199), cytokeratin 19 fragment (CYFRA21-1), neuron-specific enolase (NSE), and interleukin 6 (IL-6).