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Differential diagnosis of non-islet cell hypoglycemia.
| Insulin (3 mcu/ml) | C-peptide (0.2 mmol/L) | Proinsulin 5 pmol/L | Beta-hydroxybutyrate (2.7 mmol/L) | |
|---|---|---|---|---|
| Insulinoma/sulfonylurea | High | High | High | Low |
| Exogenous insulin | High | Low | Low | Low |
| Nonislet cell hypoglycemia | Low | Low | Low | Low |
| Insulin-independent hypoglycemia | Low | Low | Low | High |
mcu, microunits; mmol, millimole; pmol, picomoles; L, liter; ml, milliliter.
