5‐HIAA, Plasma

Casandra

Casandra Test Code LC94474Version 1 (DRAFT)

Performing Lab

Lab LabcorpLab Test ID 504510CPT Code 83497

Also known as: 5-hydroxyindoleacetic acid

Clinical Use

Order Test

Use

Plasma 5-hydroxy-indoleacetic acid (5HIAA or 5-HIAA) is a metabolite of serotonin that can be elevated as a result of carcinoid tumors/carcinoid syndrome.

Special Instructions

Patients should avoid bananas, avocados, plums, eggplant, tomatoes, plantain, pineapple, walnuts, and interfering drugs for a 72-hour period prior to and during specimen collection to ensure accurate results.

Limitations

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration, indicating that it might not meet certain regulatory standards or be recognized for certain claims outside the laboratory's validation.

Test Details

Methodology

Mass Spectrometry

Biomarkers

5-hydroxyindoleacetic acid

Analyte

5-HIAA • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Order Codes

1693-1

Result Codes

1693-1

Result Turnaround Time

8-15 days

Specimen

Plasma

Volume

1.0 mL

Minimum Volume

0.5 mL

Container

Green-top (heparin) tube or lavender-top (EDTA) tube

Patient Preparation

Avoid bananas, avocados, plums, eggplant, tomatoes, plantain, pineapple, walnuts, and interfering drugs for a 72-hour period prior to and during collection.