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5-HIAA

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Also known as: HIAA; Serotonin Metabolite
Formal name: 5-hydroxyindoleacetic Acid
Related tests: Serotonin; Chromogranin A

At a Glance

Why Get Tested?

To help diagnose and monitor treatment for a carcinoid tumor that produces serotonin

When to Get Tested?

When you have symptoms suggestive of a carcinoid tumor, such as flushing, diarrhea, and/or wheezing; at intervals following treatment

Sample Required?

Test Preparation Needed?

You may be instructed to avoid certain foods and medications prior to this test.