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Biochemistry Test

5-Hydroxyindole 3-acetic acid in urine

Dr. Reeja Tharu
Written by Dr. Reeja Tharu, M.Phil.,Ph.D
Dr. Simi Paknikar
Medically Reviewed by Dr. Simi Paknikar, MD
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Test : 5-Hydroxyindole 3-acetic acid in urine


Indications : gastrointestinal tract tumors

Physiology : It is synthesised from serotonin which is present only in blood platelets and excreated in urine.

Normal Range : Daily excreation-2-9mgs/day.

Interpretation : Increased levels are seen in carcinoid syndrome characterised by cancer of digestive tract.

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