5-HIAA

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Also known as: 5-hydroxyindoleacetic acid; 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 serotonin-secreting carcinoid tumour

When to Get Tested?

When you have symptoms suggestive of a carcinoid tumour such as flushing, diarrhoea, 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. Please follow any instructions you are given.