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Adult diffuse nesidioblastosis: genetically or environmentally induced?
Günter Klöppel1, Martin Anlauf, Andreas Raffel
1Department of Pathology, University of Kiel, 24105 Kiel, Germany. guenterkloeppel@path.uni-kiel.de
Human Pathology
|December 12, 2007
Summary
Nesidioblastosis, a rare cause of adult hyperinsulinemic hypoglycemia, involves beta-cell abnormalities. Its frequency may be increasing, particularly after gastric bypass surgery in obese patients.
Area of Science:
- Endocrinology
- Gastroenterology
- Pathology
Background:
- Persistent hyperinsulinemic hypoglycemia in adults is typically caused by insulinomas.
- Nesidioblastosis, a functional beta-cell disorder, is an increasingly recognized rare cause.
- Histopathologic features resemble congenital hyperinsulinism but show greater inter-patient variability.
Purpose of the Study:
- To describe the characteristics of adult nesidioblastosis.
- To explore potential associations and causes of this condition.
Main Methods:
- Histopathologic analysis of pancreatic tissue.
- Clinical case review.
Main Results:
- Adult nesidioblastosis exhibits beta-cell hypertrophy, islet hyperplasia, and increased beta-cell mass.
- Observed association with gastric bypass surgery in obese patients.
- The condition's cause remains unknown, but a reactive process is suggested.
Conclusions:
- Nesidioblastosis is a significant, albeit rare, cause of adult hyperinsulinemic hypoglycemia.
- Gastric bypass surgery may unmask or induce beta-cell defects leading to nesidioblastosis.
- Further research is needed to elucidate the etiology of adult nesidioblastosis.
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