Lymphatic Mapping with Isosulfan Blue and Sentinel Lymph Node Biopsy for Breast Cancer Patients
Abstract
Background: Lymphatic mapping and sentinel Iymph node biopsy has been studied worldwide to establish its role in staging for breast cancer patients. Theoretically, axillary dissection could be omitted if the first tumor draining node (sentinel node) contained no cancer. We studied the technical feasibility of lymphatic mapping with isosulfan blud and sentinel lymph node biopsy in breast cancer patients.
Patients and Methods: After informed consent, patients who had axillary dissection as a part of their treatment during December 1998-May 1999 were included. Isosulfan blue dye, amount of 3-5 ml, was injected into breast tissue around the palpable breast mass or around the biopsied cavity. The axilla was explored to identify a blue staining lymph node (sentinel node). Then the sentinel lymph node was biopsied and complete axillary dissection was performed for pathological comparison.
Results: Of 15 patients, 12 patients had mofified radical mastectomy and 3 patients had partial mastectomy + axillary dissection as their treatment. The sentinel Iymph node was able to identify in 13 patients (87%). Sentinel lymph node can accurately diagnose axillary metastasis when compared to the axillary dissection in 12 out of 13 patients (92%), with 7 true negative, 5 true positive and 1 false negative.
Conclusion: The technique of lymphatic mapping using isosulfan blue dye and sentinel Iymph node biopsy is feasible and reproducible for breast cancer patients in Thailand. Further studies should be carried out to ensure the usefulness of sentinel lymph node biopsy technique, which depend on the proportion of sentinel node identified and the accuracy comparing to axillary dissection
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