What are the diagnostic criteria for insulinoma?

Updated: May 31, 2020
  • Author: Zonera Ashraf Ali, MBBS; Chief Editor: Neetu Radhakrishnan, MD  more...
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Common diagnostic criteria include documentation of blood glucose level

  • Increased plasma insulin level (≥6 μU/ml)
  • Increased C peptide level (≥0.2 nmol/l)
  • Increased proinsulin level (≥5 pmol/l)

Once the diagnosis of insulinoma has been established biochemically, imaging studies are used to localize the tumor.

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