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Related Experiment Videos

Neoplasms Causing Nonhyperinsulinemic Hypoglycemia.

Ricardo V. Lloyd1, Lori A. Erickson, Antonio G. Nascimento

  • 1MD, PHD.

Endocrine Pathology
|July 13, 2002
PubMed
Summary
This summary is machine-generated.

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Non-islet cell tumor hypoglycemia (NICTH) is rare. While tumors often produce insulin-like growth factor II (IGF-II), its presence doesn't reliably predict hypoglycemia in patients.

Area of Science:

  • Endocrinology
  • Oncology
  • Molecular Biology

Background:

  • Non-islet cell tumor hypoglycemia (NICTH) is an uncommon condition often linked to mesenchymal tumors and elevated insulin-like growth factor II (IGF-II).
  • The diagnostic utility of IGF-II expression in predicting NICTH remains unclear.

Purpose of the Study:

  • To investigate the expression of IGF-II protein and mRNA in various tumors.
  • To determine the correlation between IGF-II expression and the presence of hypoglycemia.

Main Methods:

  • Analysis of IGF-II protein and mRNA in pituitary, adrenocortical, solitary fibrous, and other mesenchymal tumors.
  • Correlation of IGF-II expression levels with tumor size and clinical hypoglycemia.

Main Results:

Related Experiment Videos

  • Most mesenchymal tumors expressed IGF-II protein and mRNA, irrespective of hypoglycemia.
  • Tumor size significantly correlated with IGF-II production; larger tumors (>9 cm) were more frequently positive for IGF-II mRNA.
  • Only a small fraction of patients with IGF-II-expressing tumors (4 out of 48) presented with hypoglycemia.

Conclusions:

  • IGF-II expression is common in mesenchymal tumors but does not reliably indicate clinical hypoglycemia.
  • Tumor size is a better predictor of IGF-II production than hypoglycemia itself.
  • Detecting IGF-II in tumors is feasible but insufficient for diagnosing NICTH.