Chromogranin APharmaceutical InformationUpdated on May 30, 2019 View more like this | Visit SHIRLEY, NY | Contact Cathy Miller |

Chromogranin A (CgA) is a protein released from neuroendocrine cells. These are cells that secrete hormones in response to signals from the nervous system. They are found in organs throughout the body. This test measures the amount of chromogranin A in the blood.