Chromogranin A

Also known as: CgA

Formal name: Chromogranin A

Related tests: Serotonin, 5-HIAA, Catecholamines, Tumor Markers

At a Glance

Why Get Tested?

To help diagnose and monitor carcinoid tumors and other neuroendocrine tumors

When to Get Tested?

When you have symptoms suggestive of a carcinoid tumor such as flushing, diarrhea, and/or wheezing; when your doctor thinks that you may have a carcinoid or other neuroendocrine tumor

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

None

This article was last reviewed on December 13, 2007. | This page was last modified on March 6, 2010.

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