Neuron Specific Enolase(NSE) CLIA kit (Chemiluminescence Immunoassay) is an in vitro diagnostic quantitative test kit. NSE is an enzyme that is found in the cytoplasm of neurons and neuroendocrine cells. NSE is aiding in the detection and monitoring of neuroendocrine tumors (NETs), particularly those associated with small-cell lung cancer (SCLC).