Insulinoma induced hypoglycemia in a type 2 diabetic patient

Wien Klin Wochenschr. 2001 Apr 30;113(9):339-41.

Abstract

Insulinoma in a patient with pre-existing diabetes mellitus is extremely rare. We report a case of an insulinoma in a patient with type 2 diabetes mellitus who after 14 years of sulfonylurea treatment experienced recurrent episodes of hypoglycemia. Endogenous hyperinsulinism was confirmed and endoscopic ultrasonography identified a pancreatic tumor, which was positive for insulin by immuno-histological staining. After surgical excision of the tumor, no further hypoglycemic attacks occurred. Loss of body weight after removal of the tumor correlated with a dramatic reduction of insulin resistance to such a degree that diet alone proved sufficient for satisfactory glycemic control.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Diabetes Mellitus, Type 2 / complications*
  • Humans
  • Hyperinsulinism / etiology
  • Hypoglycemia / etiology*
  • Insulin Resistance
  • Insulinoma / complications*
  • Insulinoma / diagnosis*
  • Insulinoma / diagnostic imaging
  • Insulinoma / pathology
  • Insulinoma / surgery
  • Male
  • Memory Disorders / etiology
  • Pancreas / diagnostic imaging
  • Pancreas / pathology
  • Pancreas / surgery
  • Pancreatic Neoplasms / complications*
  • Pancreatic Neoplasms / diagnosis*
  • Pancreatic Neoplasms / diagnostic imaging
  • Pancreatic Neoplasms / pathology
  • Pancreatic Neoplasms / surgery
  • Treatment Outcome
  • Ultrasonography