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Serotonin

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Also known as: 5-Hydroxytryptamine; 5-HT
Formal name: Serotonin
Related tests: 5-HIAA; Chromogranin A

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At a Glance

Why Get Tested?

To help diagnose 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

Sample Required?

A blood sample drawn from a vein in your arm

Test Preparation Needed?

None