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Related Concept Videos

Pleural Disorders: Types and Brief Description01:30

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Updated: Jul 12, 2025

Implantation and Monitoring by PET/CT of an Orthotopic Model of Human Pleural Mesothelioma in Athymic Mice
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Updates on grading mesothelioma.

Jefree J Schulte1, Aliya N Husain2

  • 1The University of Wisconsin, Madison, WI, USA.

Histopathology
|October 23, 2023
PubMed
Summary
This summary is machine-generated.

A new grading system for epithelioid mesothelioma improves prognosis prediction. This two-tiered system combines nuclear grade and necrosis, offering better survival insights for this rare cancer.

Keywords:
Epithelioid mesotheliomamesotheliomanuclear grading

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Area of Science:

  • Oncology
  • Pathology
  • Cancer Prognostics

Background:

  • Mesothelioma, a rare cancer, historically has a poor prognosis.
  • A grading system for epithelioid mesothelioma has emerged as a crucial prognostic tool over the last decade.
  • This grading system is now recommended by major pathology organizations and expert groups.

Purpose of the Study:

  • To review the development of the current grading system for epithelioid mesothelioma.
  • To discuss the limitations and applications of this grading system.
  • To explore alternative grading systems and future directions in mesothelioma prognostication.

Main Methods:

  • Review of the evolution of mesothelioma grading systems.
  • Analysis of the combination of nuclear grading and necrosis assessment.
  • Discussion on the application of grading to cytology and extra-pleural specimens.

Main Results:

  • The original three-tiered nuclear grading system differentiated survival in epithelioid mesothelioma.
  • The current two-tiered system integrates nuclear grade and necrosis into low- and high-grade categories.
  • This refined system provides a more robust prognostic assessment.

Conclusions:

  • The developed grading system is a powerful prognostic tool for epithelioid mesothelioma.
  • The two-tiered system (low- vs. high-grade) is the current standard.
  • Further research into grading system applications and alternatives is warranted.