ENO2 and neoplasm: Carcinoembryonic antigen (CEA; 4.3 ng/mL), squamous cell carcinoma antigen (SCC; 5.3 ng/mL), cytokeratin 19 fragment (CYFRA; 5.3 ng/mL), neuron specific enolase (NSE; 13.5 ng/mL), and pro-gastrin-releasing peptide (pro-GRP; 78.8 pg/mL) levels as tumor markers were modestly increased up, but carbohydrate antigen (CA) 19–9 and sialyl Lewis X-i antigen (SLX) levels were within normal limits.