Proinsulin is used to detect and monitor excessive hormone production from insulinomas. Proinsulin is the prohormone precursor to insulin made in the beta cells of the islets of Langerhans, specialized regions of the pancreas. In humans, proinsulin is encoded by the INS gene.
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- Fasting Required: NO
- Preferred Specimen: Serum
- Reference Range(s): ≤18.8 pmol/L
- Limitations: Spironolactone and some herbal drugs may interfere with this test.
- Turnaround Time: 5 Days
- Test Code: 760