Fasting required (8 hours)
Note: This test should not be requested on patients who have recently received radioactive material.
Useful For: VIP is a neurotransmitter. VIP-secreting tumors, most commonly found in the tail of the pancreas, can cause secretory diarrhea. In children, the tumors are ganglioneuromas or ganglioneuroblastomas and commonly occur in the adrenal glands.
Methodology: Radioimmunoassay (RIA) , Extraction
Specimen Requirements: 1 lavender-top (EDTA) tube (minimum: 0.55 mL of EDTA plasma). Centrifuge lavender-top 30 minutes after draw. Separate plasma and send specimen frozen in plastic vial.
Analytical Time: 4 days
Days Set Up: Tuesday, Friday