ENO2 and neoplasm: After admission to the hospital, all tumor markers, such as serum carcinoembryonic antigen (CEA), neuron-specific enolase (NSE), alpha fetoprotein (AFP), prostate specific antigen (PSA), cytokeratin 19 fragment (Cyfra21–1), carbohydrate antigen 19–9 (CA19–9), and carbohydrate antigen 72–4 (CA72–4), were within normal ranges.