ENO2 and neoplasm: Elevated tumor marker levels were observed in blood, including CYFRA21-1 (4.26 ng/mL, normal value: 0–3.3 ng/mL), neuron-specific enolase (25.84 ng/mL, normal value: 0–16.3 ng/mL), and CEA (41.83 ng/mL, normal value: 0–5 ng/mL).