2024 World Conference on Lung Cancer (WCLC) - ePosters-EP.06G.03 Newly WHO Reporting System for Lung Cytopathology: Reproducibility Test of the Diagnosis

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The study presented by Yuko Minami and colleagues evaluates the reproducibility of the new WHO Reporting System for Lung Cytopathology, introduced in 2022. The system classifies lung cytopathology into five categories: "insufficient/inadequate/non-diagnostic," "benign," "atypical," "suspicious for malignancy," and "malignant." This research aims to assess how effectively these categories can be applied globally and to identify any existing issues.<br /><br />The study utilized 42 cases that were histologically confirmed through biopsy or surgical material. Participants evaluated these cases using an online system, with an initial assessment followed by a tutorial and a subsequent reassessment. Categories examined included benign, atypical, suspicious for malignancy, and malignant.<br /><br />The results highlighted improvements in diagnostic accuracy following the tutorial, particularly in the "suspicious for malignancy" category. The overall correct response rate increased from 38.1% to 48.3% after the tutorial. However, cases in the "atypical" and "suspicious for malignancy" categories remained challenging, indicating a need for enhanced educational resources to improve diagnostic consensus.<br /><br />The study emphasizes the importance of robust tutorials for the effective application of the WHO's classification system, suggesting that further refinement and dissemination of this educational material is critical for consistent global adoption. The findings underscore the challenge in diagnosing atypical and suspicious cases and highlight the necessity for continuous improvement of diagnostic criteria and educational approaches in lung cytopathology.<br /><br />In conclusion, while the WHO Reporting System for Lung Cytopathology offers a structured framework, the study reveals that further work is needed to ensure its effective implementation and accuracy, particularly in complex diagnostic categories.

Asset Subtitle

Yuko Minami

Meta Tag

Speaker Yuko Minami

Topic Pathology and Biomarkers

Keywords

WHO Reporting System

Lung Cytopathology

reproducibility

diagnostic accuracy

educational resources

global adoption

atypical cases

malignancy

diagnostic criteria

Yuko Minami