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Eight false negative sentinel node procedures in breast cancer: what went wrong?
S H Estourgie1, O E Nieweg, R A Valdés Olmos
1Department of Surgery, The Netherlands Cancer Institute, Amsterdam, The Netherlands. s.estourgie@nki.nl
Summary
Evaluating false negative sentinel node biopsies in breast cancer patients revealed an overall false negative rate of 1.4%. Recommendations include intra-operative palpation and specific pathological slicing for improved accuracy.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Sentinel lymph node biopsy (SLNB) is a standard staging procedure for early-stage breast cancer.
- Accurate staging is crucial for determining appropriate treatment and prognosis.
Observation:
- This study evaluated the false negative rate of SLNB in 599 clinical N0 breast cancer patients.
- A total of 606 SLNB procedures were performed between January 1997 and November 2001.
Findings:
- The sentinel node was identified in 565 patients, with metastasis detected in 204 (36.1%).
- Eight patients (1.4%) experienced false negative sentinel node results.
- Causes identified included surgical delay, pathological sampling error, and tumor blocking.
Implications:
- Intra-operative palpation of the axilla for suspicious nodes is recommended.
- Pathological examination protocols, including seven slices (50-150 µm), balance sensitivity and workload.
- Optimizing SLNB procedures can reduce false negatives and improve breast cancer staging.