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Related Experiment Videos

Pseudoglandular elements in schwannomas.

Christopher A Robinson1, Bernadette Curry, N Barry Rewcastle

  • 1Department of Pathology, University of Calgary and Foothills Medical Center, Calgary, Alberta, Canada. christopher.robinson@saskatoonhealthregion.ca

Archives of Pathology & Laboratory Medicine
|August 27, 2005
PubMed
Summary
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Pseudoglandular elements in schwannomas, a rare variant, appear in 7.9% of cases. These elements likely result from degeneration, not a distinct schwannoma type, and show no increased growth potential.

Area of Science:

  • Surgical Pathology
  • Oncology
  • Neurosurgery

Background:

  • Schwannomas rarely exhibit a coexisting glandular component.
  • The pseudoglandular schwannoma is a recently described variant characterized by cystic spaces lined by neoplastic Schwann cells with an epithelial-like appearance.

Purpose of the Study:

  • Determine the incidence of pseudoglandular elements in schwannomas.
  • Describe the morphology of schwannomas with pseudoglandular elements.
  • Discuss the development and biological significance of these elements.

Main Methods:

  • Screened 202 schwannomas from various anatomic sites.
  • Utilized light microscopy, immunohistochemistry, and electron microscopy for examination.
  • Assessed for the presence and characteristics of pseudoglandular elements.

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Main Results:

  • Pseudoglandular elements were identified in 16 (7.9%) of the schwannomas.
  • These elements displayed variable organization and were found in diverse schwannoma morphologies.
  • Immunohistochemistry and ultrastructural analysis confirmed the Schwann cell origin of these elements, with no increased proliferative activity.

Conclusions:

  • Pseudoglandular elements are likely a degenerative phenomenon, not a distinct schwannoma variant.
  • These elements may reflect the Schwann cell's tendency towards palisade formation.
  • They can occur in various schwannoma types and do not exhibit unique growth potential.