High-resolution ultrasonographic features of axillary lymph node metastasis in patients with breast cancer
Yoon Jung Choi, Eun Young Ko, Boo-Kyung Han, Jung Hee Shin, Seok Seon Kang, Soo Yeon Hahn
The Breast 18 (2009) 119–122
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US features known to accurately predict metastasis in axillary lymph nodes could be used at the time of the preoperative breast US to determine the need for FNA, SLN or ALND. Results of the present study indicate that a cortical thickness greater than 3 mm is the most reliable US feature predicting a metastasis, with sensitivity, specificity, PPV and NPV around 70%. For the L/S ratio, those parameters were only 52–65% accurate
Recent advances in high-resolution US allow examination of more detailed features of lymph nodes, such as cortex shape and internal hilar echogenicity, which may prove to be useful indicators of metastasis. Our results showed that the absence of a hilum had high specificity, but low sensitivity. Previous studies found that a hyperechogenic hilum indicated a benign lymph node, and loss of normal echogenicity had moderate to high specificity for metastasis
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