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Intraoperative real-time genetic diagnosis for sentinel node navigation surgery
H Hamakawa1, A Onishi, T Sumida
1Department of Oral & Maxillofacial Surgery, Ehime University School of Medicine, Shitsukawa, Shigenobu-cho, Onsen-gun, Ehime 791-0295, Japan. hamakawa@m.ehime-u.ac.jp
International Journal of Oral and Maxillofacial Surgery
|September 1, 2004
Summary
Sentinel node navigation surgery (SNNS) for early oral cancer now offers faster intraoperative results. This genetic diagnostic technique accurately identifies micrometastasis, helping to avoid unnecessary neck dissections.
Area of Science:
- Oncology
- Surgical Pathology
- Molecular Diagnostics
Background:
- Sentinel node navigation surgery (SNNS) is crucial for staging early oral cancer.
- Accurate and rapid diagnosis of micrometastasis in sentinel nodes is a significant challenge.
Purpose of the Study:
- To develop and evaluate a rapid intraoperative genetic diagnostic technique for sentinel lymph nodes in early oral cancer patients.
- To assess the feasibility of SNNS supported by real-time genetic analysis to guide neck dissection decisions.
Main Methods:
- A novel one-step reverse-transcriptase polymerase chain reaction method was employed for genetic analysis.
- mRNA quality was assessed, and the total examination time was optimized.
- Ten patients with early N0 oral cancer underwent SNNS using the developed technique.
Main Results:
- The genetic diagnosis time was reduced to 2 hours, enabling intraoperative assessment.
- High-quality mRNA was extracted from sentinel nodes.
- Micrometastasis was detected in six sentinel nodes from four patients, leading to neck dissection; six patients avoided surgery.
Conclusions:
- Intraoperative genetic diagnosis of micrometastasis is a promising, sensitive method to support SNNS in early oral cancer.
- This technique can improve surgical decision-making, potentially reducing overtreatment.