ENO2 and neoplasm: The levels of serum tumor markers, including alpha fetal protein (AFP), carcino-embryonic antigen (CEA), β-human chorionic gonadotropin (β-hCG), neuron-specific enolase (NSE), carbohydrate antigen199 (CA199), squamous cell carcinoma antigen, cytokeratin-19-fragment CYFRA21-1 (CA211), cancer antigen 242 (CA242), cancer antigen 153 (CA153) and cancer antigen 125 (CA125) were not elevated.