The measurement of general and specific biochemical markers in patients with neuroendocrine tumours assists with diagnosis and gives an indication of the effectiveness of treatment and they may be used as prognostic indicators.These are substances sometimes found in the blood, other body fluids, or tissues. A high level of tumor marker may mean that a certain type of cancer is in the body. Examples of neuroendocrine tumor markers include Urine 5-HIAA, blood serotonin, chromogranin A., pancreatic polypeptide, gastrin etc. Also called biomarker.
