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What is a 5-OH INDOL ACETIC ACID (5HIAA), SPOT URINE?

The 5-Hydroxyindoleacetic Acid (5-HIAA), Spot Urine test measures the level of 5-HIAA, a breakdown product of serotonin, in a single urine sample. This test is commonly used to help diagnose and monitor carcinoid tumors, which can produce excess serotonin. By detecting elevated levels of 5-HIAA, doctors can assess abnormal serotonin metabolism and evaluate symptoms such as flushing, diarrhea, or wheezing, guiding further investigations and treatment decisions for suspected neuroendocrine disorders.

Additional Information

Also known as/ Other names: 5-HIAA spot urine test, Urinary 5-HIAA (random sample), 5-Hydroxyindoleacetic acid, urine (spot), Serotonin metabolite test (spot urine), Random urine 5-HIAA
Parameters: 1
Recommended for: M/F/Others
Sample Type: Random Urine
Patient Preparation: Strictly avoid banana, kiwi, walnut, avocado, brinjal, pineapple, plum, tomato & drugs like Fluorouracil, Melphalan, Paracetamol & Acetaminophen, Heparin, L-dopa, Reserpine, Salicylates, Chlorpromazine, Imipramine, Isoniazid, MAO inhibitors, Phenothiazines, Promethazine, alcoholic beverages, caffeine, tea/coffee, tobacco and strenuous exercise at least 72 hrs before & during specimen collection.
Reports: 4 days

FAQs

What conditions can this test detect?

It primarily helps identify carcinoid tumors and serotonin-secreting neuroendocrine disorders.

Can medications affect the results?

Yes, antidepressants, cough syrups, and certain drugs can alter serotonin levels. Inform your doctor about all medications.

What does a high level mean?

Elevated 5-HIAA levels may indicate carcinoid tumors or excessive serotonin production.

What does a low level mean?

Low levels are usually normal but may also reflect dietary or medication influences.

Can diet affect the results?

Yes, foods like bananas, walnuts, avocados, and tomatoes can raise serotonin levels and affect results.

Is the spot urine test different from a 24-hour test?

Certainly, the spot test uses a single sample, while the 24-hour test collects all urine over a day for more comprehensive results.

Can dehydration affect the test results?

Yes, dehydration can concentrate urine and potentially alter 5-HIAA levels, so adequate hydration is recommended before collection.

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