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Related Experiment Videos

Morphologic and immunophenotypic characterization of primary brain lymphomas using paraffin-embedded tissue.

J K Murphy1, C J O'Brien, J W Ironside

  • 1Department of Pathology, University of Leeds, UK.

Histopathology
|November 1, 1989
PubMed
Summary

Primary brain lymphomas, a rare cancer, are increasing in incidence. This study analyzed 29 cases, finding most were high-grade B-cell lymphomas without immunosuppression.

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Area of Science:

  • Neuropathology
  • Oncology
  • Immunology

Background:

  • Primary brain lymphomas are rare intracranial neoplasms, accounting for ~1% of all such tumors.
  • Recent trends suggest an increasing incidence of primary brain lymphomas.
  • Most cases are typically associated with an immunosuppressed state.

Purpose of the Study:

  • To investigate the incidence and characteristics of primary brain lymphomas.
  • To classify these tumors morphologically and immunophenotypically.
  • To evaluate diagnostic methods for primary brain lymphomas.

Main Methods:

  • Retrospective review of 29 primary brain lymphoma cases from 1970-1988.
  • Morphological classification using Kiel criteria.
  • Immunophenotypic analysis using antibody panels on cryostat and paraffin-embedded tissues.

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Main Results:

  • A striking increase in primary brain lymphoma incidence was observed during the study period.
  • No overt immunosuppression was evident in any of the reviewed cases.
  • The majority of tumors were high-grade B-cell lymphomas, with some showing plasmacytoid features. A reactive T-cell population was noted in all cases.
  • Immunophenotyping on paraffin-embedded tissue proved comparable to cryostat sections, highlighting its utility for small biopsies.

Conclusions:

  • Primary brain lymphoma incidence is increasing, and immunosuppression is not always a factor.
  • High-grade B-cell lymphomas are predominant, and detailed immunophenotyping is crucial for diagnosis.
  • Immunohistochemistry on paraffin-embedded tissues is valuable for diagnosing primary brain lymphomas, especially from stereotactic biopsies.