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Molecular margins in head and neck cancer: Current techniques and future directions
Katelyn O Stepan1, Michael M Li2, Stephen Y Kang2
1Department of Otolaryngology - Head and Neck Surgery, Washington University School of Medicine, 4921 Parkview Pl, St. Louis, MO 63110, USA.
Abstract:
Complete tumor extirpation with clear surgical margins remains a central tenet of oncologic head and neck surgery. Rates of locoregional recurrence and survival are both significantly worse when clear margins are unable to be obtained. Current clinical practice relies on the use of frozen sections intra-operatively, followed by traditional histopathologic analysis post-operatively to assess the surgical margin. However, with improved understanding of tumor biology and advances in technology, new techniques have emerged to analyze margins at a molecular level. Such molecular margin analysis interrogates tissue for genetic, epigenetic, or proteomic changes that may belie tumor presence or aggressive features not captured by standard histopathologic techniques. Intra-operatively, this information may be used to guide resection, while post-operatively, it may help to stratify patients for adjuvant treatment. In this review, we summarize the current state of molecular margin analysis and describe directions for future research.
Insights
Molecular margin analysis offers advanced insights beyond traditional pathology for head and neck cancer surgery. This technique detects subtle tumor changes, potentially improving surgical guidance and patient stratification for better outcomes.
Area of Science:
- Oncologic Surgery
- Molecular Pathology
- Head and Neck Cancer
Background:
- Complete tumor removal with clear margins is crucial in head and neck cancer surgery.
- Positive margins correlate with higher recurrence rates and poorer survival.
- Current methods like frozen sections have limitations in detecting all tumor presence.
Purpose of the Study:
- To review the current state of molecular margin analysis in head and neck surgery.
- To explore novel techniques for assessing surgical margins at a molecular level.
- To discuss future research directions in molecular margin analysis.
Main Methods:
- Review of current literature on molecular margin analysis techniques.
- Discussion of genetic, epigenetic, and proteomic analyses for margin assessment.
- Comparison with traditional histopathologic methods.
Main Results:
- Molecular analysis can detect tumor presence and aggressive features missed by standard pathology.
- Intra-operative molecular data can guide surgical resection.
- Post-operative molecular data aids in stratifying patients for adjuvant therapies.
Conclusions:
- Molecular margin analysis represents a significant advancement over conventional techniques.
- This approach holds promise for improving surgical decision-making and treatment planning.
- Further research is needed to fully integrate molecular margin analysis into clinical practice.
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