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The Application of 1% Methylene Blue Dye As a Single Technique in Breast Cancer Sentinel Node Biopsy
Published on: June 1, 2019
Radioactivity thresholds for sentinel node biopsy in breast cancer
Summary
Biopsying multiple radioactive lymph nodes, not just the most radioactive one, is crucial for accurate breast cancer staging. Removing all radioactive nodes minimizes the risk of false-negative results in sentinel lymph node biopsy.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Sentinel lymph node biopsy (SNB) is a standard procedure for staging breast cancer.
- Accurate identification of metastatic spread to lymph nodes is critical for treatment decisions.
Purpose of the Study:
- To determine the optimal number and extent of radioactive lymph nodes to biopsy after the most radioactive sentinel node (SN) is removed.
- To evaluate the impact of biopsy strategy on the accuracy of breast cancer staging.
Main Methods:
- A retrospective analysis of 1179 primary breast cancer cases undergoing radionuclide-guided SNB.
- Comparison of radioactivity levels and pathological results of multiple biopsied lymph nodes.
- Assessment of metastasis in relation to the most radioactive node and other radioactive nodes.
Main Results:
- In 686 cases, an average of 1.9 radioactive SNs were biopsied.
- Metastasis was found in the most radioactive node only in 64 cases, in other nodes only in 39, and in both in 39 cases.
- Employing stricter criteria increased false-positive results.
Conclusions:
- Harvesting radioactive lymph nodes beyond the most radioactive one is necessary.
- Complete removal of all detected radioactive lymph nodes is essential to minimize false-negative findings and improve staging accuracy.
