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  • Title: Ultrasound and fine needle aspiration cytology of axillary lymph nodes in breast cancer. To do or not to do?
    Author: Leenders MW, Broeders M, Croese C, Richir MC, Go HL, Langenhorst BL, Meijer S, Schreurs WH.
    Journal: Breast; 2012 Aug; 21(4):578-83. PubMed ID: 22717665.
    Abstract:
    AIM: The purpose of our study was to evaluate the accuracy of axillary ultrasound and ultrasound-guided fine needle aspiration cytology (FNAC) in the preoperative diagnosis of axillary metastases. METHODS: Between 2004 and 2009, 1132 female patients were evaluated and treated in our clinic for histologically proven breast carcinoma. Preoperative axillary ultrasound with subsequent FNAC in case of suspicious lymph nodes was performed in 1150 axillae (18 bilateral breast carcinomas). We analyzed the results of axillary ultrasound and FNAC retrospectively. Pathological node status was used as the reference standard (based on axillary dissection or sentinel node biopsy). RESULTS: Axillary ultrasound showed suspicious lymph nodes in 327 axillae (28.4%). FNAC showed axillary metastases in 107 of these 327 axillae. Final histological analysis confirmed 106 metastases (one false positive). Histological analysis showed metastatic disease in 429 of 1150 axillae (37.3%). Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of axillary ultrasound alone were 43.8% (188/429), 80.7% (582/721), 57.5% (188/327) and 70.7% (582/823), respectively. When combining axillary ultrasound with FNAC of suspicious lymph nodes, sensitivity was 24.7% (106/429), specificity was 99.9% (720/721), PPV was 99.1% (106/107) and NPV was 69.0% (720/1043). CONCLUSIONS: 106/429 (24.7%) Node-positive axillae were identified by ultrasound-guided FNAC and spared unnecessary sentinel node biopsy. Unfortunately, the percentage of false negative results of ultrasound-guided FNAC (28.1%, 323/1150) was very high.
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