5-HIAA

{
  "id": "MLC-T-ONC-000069",
  "term": "5-HIAA",
  "field": "Oncology and biomedicine",
  "definition": "A substance formed by the breakdown of a hormone called serotonin in the liver. Nerves use serotonin to send messages to one another. After 5-HIAA is broken down from serotonin in the liver, the kidneys filter it from the blood and pass it into the urine. Serotonin and 5-HIAA may be found in higher-than-normal amounts in patients with certain tumors, such as carcinoid tumor. Measuring the amount of 5-HIAA in the urine may help diagnose and monitor carcinoid tumors and other conditions. 5-HIAA is a type of tumor marker. Also called 5-hydroxyindoleacetic acid.",
  "expansions": [
    "5-hydroxyindoleacetic acid"
  ],
  "references": [
    "NCI Dictionary of Cancer Terms"
  ],
  "url": "https://mlchart.com/terminology/oncology/5-hiaa/"
}