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Para-aortic lymph node micrometastasis in patients with node-negative biliary cancer.
Atsuya Yonemori1, Satoshi Kondo, Yoshihiro Matsuno
1Division of Cancer Medicine, Department of Surgical Oncology, Hokkaido University Graduate School of Medicine, Sapporo, Japan. a-yone @ kushiro.jrc.or.jp
Digestive Surgery
|September 17, 2011
Summary
Para-aortic lymph node micrometastasis was detected in 5% of node-negative biliary cancer patients. Despite advanced cancer, these patients showed long-term survival, suggesting micrometastasis may not impact prognosis.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Para-aortic lymph node metastasis significantly worsens biliary cancer prognosis.
- Accurate staging is crucial for predicting outcomes in biliary cancer patients.
Purpose of the Study:
- To identify para-aortic lymph node micrometastases in biliary cancer using immunohistochemistry.
- To evaluate the clinical significance of these micrometastases on patient survival.
Main Methods:
- Immunohistochemistry using CAM5.2 antibody was performed on 529 para-aortic lymph nodes from 66 patients.
- Nodes were initially classified as negative by conventional analysis.
Main Results:
- Occult carcinoma cells (micrometastases) were found in para-aortic lymph nodes of 3 patients (5%).
- All 3 patients with detected micrometastasis are alive with long-term survival (45-90 months) post-surgery.
- One patient also had regional lymph node micrometastasis.
Conclusions:
- Micrometastases in para-aortic lymph nodes were identified in 5% of node-negative biliary cancer patients.
- Despite micrometastasis, long-term survival suggests it may not negatively impact prognosis.
- Further large-scale studies are needed to confirm these findings.
