ENO2 and neuroendocrine neoplasm: γ-enolase, also called neuron-specific enolase (NSE), is expressed in neuronal tissues and neuronal tissues as an inhibitor in a wide variety of diseases (including Neuroendocrine Tumor (NET), Small Cell Lung Cancer (SCLC), Gastroenteropancreatic (GEP)-NET, etc.)biomarkers.