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Molecular Classification of Endometrial Cancers Using an Integrative DNA Sequencing Panel.
Soyoun R Kim1,2, Leslie Oldfield3, Raymond H Kim4,5,6,7
1Division of Gynecologic Oncology, Princess Margaret Cancer Centre, Sinai Health Systems, University Health Network, Toronto, Ontario, Canada.
Journal of Surgical Oncology
|November 6, 2024
Summary
A new targeted sequencing panel simplifies molecular classification of endometrial cancer (EC) into four subgroups. This approach aids clinical practice by overcoming the complexity of multiple assays for EC diagnosis.
Area of Science:
- Gynecologic Oncology
- Molecular Pathology
- Cancer Genomics
Background:
- Molecular classification of endometrial cancer (EC) is crucial but complex for clinical integration.
- Current methods require coordination of multiple assays, posing a challenge for routine practice.
Purpose of the Study:
- To develop a simplified molecular technique for classifying EC into four distinct subgroups.
- To validate a custom-designed targeted sequencing panel for EC subtyping.
Main Methods:
- Prospective recruitment of 181 newly diagnosed EC patients from three Canadian cancer centers.
- Targeted sequencing of EC samples using a custom panel to analyze variants.
- Retrospective collection of clinicopathologic information and analysis of variant pathogenicity.
Main Results:
- The panel successfully classified ECs, identifying 48% as mismatch repair deficient (MMRd).
- Subgroup analysis revealed distinct molecular profiles including POLEmut, p53abn, and NSMP.
- MLH1 promoter methylation within the MMRd group was associated with worse patient outcomes compared to somatic MMR gene variants.
Conclusions:
- The developed targeted sequencing panel offers a simplified and effective method for EC molecular classification.
- This technique is suitable for reflexive implementation in clinical practice, improving EC patient management.
