Nesidioblastosis in adults without insular hyperfunction.

Area of Science:

• Endocrinology
• Histopathology

Background:

• Nesidioblastosis, characterized by islet cell proliferation, is typically associated with hyperinsulinemic hypoglycemia.
• The presence and significance of nesidioblastosis in individuals without clinical evidence of insular hyperfunction remain incompletely understood.

Purpose of the Study:

• To investigate the prevalence of minimal nesidioblastosis and ductulo-insular complexes in adult pancreases without insular hyperfunction.
• To explore potential demographic associations and developmental patterns of these pancreatic findings.

Main Methods:

• Autopsy examination of 207 adult pancreases.
• Histopathological analysis of pancreatic biopsy specimens.

Main Results:

• Minimal nesidioblastosis was detected in 36.7% of autopsy pancreases.
• Ductulo-insular complexes and insular cells within acini were found in 10.6% of biopsy specimens.
• Nesidioblastosis was more prevalent in males (61.8%).

Conclusions:

• The study identified nesidioblastosis and ductulo-insular complexes in a significant proportion of pancreases lacking clinical evidence of insular hyperfunction.
• These findings suggest asynchronous development and potentially distinct stimuli for islet cell aggregations.
• Causative factors for these pancreatic alterations were not elucidated in this series.