Test Name
5 HIAA, 24 HR URINE
Aliases
5-OH-INDOLEACETIC ACID
Abbreviations
5-HIAA
Test Classification
GROUPED TEST
Department
SPECIAL CHEMISTRY
Sub Department
-
TAT Category
BUSINESS (WORKING) TIME
Estimated TAT
120
TAT Units
HOURS
Test Requirements
TOTAL 24 hour urine volume (mL) required; add 10-30ml 6M HCl to the 24 hour urine container; explain collection instructions [refer to relevant phlebotomy aid (Phleb/Aid7) or lab handbook section on 24 hour urine collection or https://www.youtube.com/watch?v=HjF-9n0FOrw video].
Clinical Utility
A serotonin metabolite & tumor marker used in the diagnosis & monitoring of carcinoid tumors.
Last Review
26th Feb 2026