1. Should I have both the serotonin and 5-HIAA tests performed?
Serotonin and 5-HIAA offer complementary information. In some cases, 5-HIAA is preferred because it is more stable and, since it is collected for 24 hours, there is more chance of detecting increased 5-HIAA than in identifying excess serotonin that is only released intermittently. Talk to your doctor about which tests are appropriate for your condition.
2. Are some people at a higher risk for developing a carcinoid tumor?
Anyone at any age can develop a carcinoid tumor but, according to the American Cancer Society, the average age at diagnosis is usually about 55 to 65. People with a family history of multiple endocrine neoplasia (MEN1), a genetic condition that increases a person's risk of developing tumors in the endocrine system glands, may be at higher risk for developing a carcinoid tumor.
This article was last reviewed on May 10, 2011. | This article was last modified on January 27, 2014.
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