2. Why do I have to collect my urine for 24 hours?
The concentration of 5-HIAA in the urine varies throughout the day. By collecting all urine for 24 hours, the amount of 5-HIAA in the urine can be averaged over the entire day. Increases in 5-HIAA will be detected more easily in a 24hr sample than in a single random urine sample.
3. Will my results be accurate if I must continue to take my medication?
If the drug is one that can increase or decrease the amount of serotonin and 5-HIAA, then your results may be affected. However, it is up to your doctor and you to decide whether or not your medication can be safely stopped prior to and during the test collection. If your drugs must be taken, then your doctor will interpret the test results with this in mind.
4. Are some people at a higher risk for developing a carcinoid tumour?
Carcinoid tumours are rare. They can affect anyone at any age but are most commonly diagnosed in persons over 60 years.. Patients with a family history of multiple endocrine neoplasia (MEN1), a genetic condition that increases a patient's risk of developing tumours in the endocrine system glands, may be at higher risk for developing a carcinoid tumours.
This article was last reviewed on 28 November 2014. | This article was last modified on 28 November 2014.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
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