Case List History Objectives Radiology Images Questions PANCREAS Case #5 - A 45 year old with confusion and weight gain DISCUSSION QUESTIONS: 4.) What are other tests that are useful in confirming a diagnosis of insulinoma in this patient? Tests to confirm the diagnosis of insulinoma: Fasting hypoglycemia with inappropriately high levels of insulin Ratio of plasma insulin to glucose greater than 0.3 Proinsulin level is >25% of insulin Insulin antibodies present if prolonged self administration of insulin C-peptide level is undetectable in factitious hypoglycemia, elevated in insulinoma
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