Urine Tests for Neuroendocrine Tumors
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Hydroxyindoleacetic acid (5-HIAA) urine test
Hydroxyindoleacetic acid (5-HIAA) is a breakdown product of the hormone serotonin. Neuroendocrine tumors can secrete this hormone. Since serotonin levels go up and down throughout a normal day, a 24-hour urine collection of the 5-HIAA byproduct is a more reliable measurement of daily amounts of the hormone. Your doctor may use the 5-HIAA test in diagnosing and monitoring neuroendocrine cancer.
Foods to avoid for 48 hours before a Hydroxyindoleacetic acid (5-HIAA) urine test:15
- Avocados
- Bananas
- Cantaloupe
- Eggplant
- Grapefruit
- Dates
- Hickory nuts
- Honeydew melon
- Kiwi
- Pecans
- Pineapple
- Plantains
- Plums
- Tomatoes and tomato products
- Walnuts
There may also be prescription and over-the-counter medications to avoid before a 5-HIAA urine check. Make sure to get a complete list of foods and medications to avoid before the 5-HIAA test from your doctor.
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