Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.


Print this article
Share this page:
Also known as: 5-Hydroxy Tryptamine; 5-HT
Formal name: Serotonin
Related tests: 5-HIAA; Chromogranin A

At a Glance

Why Get Tested?

To help diagnose a serotonin-secreting carcinoid tumor

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?