Tag Archives: 5-Hydroxyindoleacetic Acid Test

Why am I having this test? The 5-hydroxyindoleacetic acid (5-HIAA) test is used to: Help detect some types of tumors called carcinoid tumors. These are tumors that can start in any part of the body but especially in the stomach, intestines, or lungs. Monitor the treatment of carcinoid tumors. What is being tested? This is […]