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5-HIAA

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Alternative Names

HIAA; 5-hydroxyindole acetic acid; Serotonin metabolite


Normal Values

The normal range is 3 to 15 mg/24 hr (milligrams per 24 hours)


What abnormal results mean

5-HIAA levels are usually measured to detect carcinoid tumors and follow the clinical course of patients, and to diagnose certain medical conditions such as systemic mastocytosis and endocrine tumors.


Review Date: 04/15/2005
Reviewed By: Rita Nanda, MD, Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, Chicago, IL. Review provided by VeriMed Healthcare Network.

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