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The evolving Gleason grading system.

Ni Chen1, Qiao Zhou1

  • 1Pathology Department, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China.

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|April 5, 2016
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Summary
This summary is machine-generated.

The Gleason grading system for prostate cancer has been updated through ISUP consensus meetings, leading to a new Grade Group system. This evolution impacts prostate cancer classification and treatment decisions for clinicians and pathologists.

Keywords:
Gleason gradingInternational Society of Urologic Pathology (ISUP)Prostate adenocarcinomaconsensus

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Area of Science:

  • Uropathology
  • Oncology
  • Cancer Grading Systems

Background:

  • The Gleason grading system is crucial for prostate adenocarcinoma diagnosis and treatment.
  • The system has undergone significant modifications since its inception.
  • International Society of Urologic Pathology (ISUP) consensus meetings in 2005 and 2014 were pivotal.

Purpose of the Study:

  • To review the historical evolution of the Gleason grading system.
  • To highlight major changes leading to the modern Gleason grading system.
  • To introduce the new Grade Group system adopted by the WHO classification.

Main Methods:

  • Historical review of the original Gleason scheme.
  • Analysis of modifications from ISUP consensus meetings.
  • Examination of the integration into WHO, AJCC/UICC, and NCCN guidelines.

Main Results:

  • The Gleason system has evolved substantially, incorporating consensus-driven changes.
  • A new Grade Group system was proposed by the 2014 ISUP consensus.
  • The Grade Group system was adopted by the 2016 WHO classification of prostate tumors.

Conclusions:

  • Understanding the Gleason grading system's evolution is essential for pathologists and clinicians.
  • The modern Gleason system, including the Grade Group, refines prostate cancer prognostication.
  • These advancements aid in critical treatment decision-making for prostate cancer.