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Test Code 5HIAA 5-HIAA, PLASMA

Important Note

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.

Methodology

High-pressure liquid chromatography (HPLC)/tandem mass spectrometry

Specimen Requirements

Plasma, Frozen

1.0 mL

Green-top Heparin or Lavender-top (EDTA)

Separate plasma and send frozen, stable for 14 days frozen

Stable refrigerated, 3 days

 

Patient Preparation

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

 

 

Day(s) Test Set Up

Turnaround time 8-15 Days

Test Classification and CPT Coding

83497

Performing Laboratory Information

Labcorp