Hypoglycemia secondary to factitious hyperinsulinism.

The case is reported of a young woman with spontaneous hypoglycemia due to fractions hyperinsulinism. Hyperinsulinism was established as the cause by the fact that the level of immunoreactive insulin was significantly elevated and inappropriate for the hypoglycemia. Exogenous insulin injection was implicated on the basis of the finding that serum C-peptide was suppressed. The patient later admitted injecting insulin and was discharged under psychiatric care.