found inside neuroendocrine cells, which release
chromogranin A and certain hormones into
the blood. Chromogranin A may be
found in higher than normal amounts in patients with
certain neuroendocrine tumors, small cell lung cancer,
prostate cancer, and other conditions. Measuring the amount
of chromogranin A in the blood may help to
diagnose cancer or other conditions or find out how well
treatment is working or if cancer has come back.
Chromogranin A is a type of tumor
marker. Also called CgA.