5-HIAA

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HIAA; 5-hydroxyindole acetic acid; Serotonin metabolite

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

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

Abnormal results may be due to:

• Tumors of the endocrine system or the digestive tract
• Mastocytosis

This list is not all-inclusive.

Review Date: 09/27/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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