Test/Investigation
5-Hydroxyindoleacetic acid (HIAA)
Site(s) or Laboratory offering Test/Investigation
NNUH
Units
µmol/24h
Comments/Precautions
Acid bottle required
Sample type
24-Hour urine collection bottle (acid preservative)
Turnaround times (TAT) Urgent/Routine/GP or OPD
Batched; at least once weekly
Reference intervals (adult unless stated)
5 – 63 umol/24h
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