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Axillary burden of disease following false-negative preoperative axillary evaluation
Chantal Reyna1, Marie C Lee1, Anne Frelick2
1Comprehensive Breast Program, Division of Women's Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA.
Background:
Preoperative axillary ultrasound (AUS) and fine-needle aspiration (FNA) are sensitive and specific for breast cancer nodal metastases. We hypothesize that false-negative result predicts minimal axillary disease (≤2 +nodes).
Methods:
A retrospective review of breast cancer patients receiving AUS identified T1/T2 tumors and positive sentinel node with axillary dissection. Chi-square analysis was performed using Fisher's exact test.
Results:
Of 903 AUS cases, 384 had T1/T2 tumors. False-negative rate of AUS ± FNA was 48% and 45%, respectively. Of 384 cases, 73 were sentinel node positive and had axillary dissection; 55 (75.3%) were invasive ductal carcinoma (IDC). Negative predictive value for greater than or equal to 2 nodes was 71% in IDC versus 44% for in non-IDC patients. Sixteen (29.0%) IDC patients had greater than or equal to 3 positive nodes versus 10 (55.5%) non-IDC (P = .05) patients.
Conclusion:
The high negative predictive value for AUS with FNA for IDC suggests that the AUS plus FNA interpretation may be better limited to the ipsilateral nodes of IDC.
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