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Table 4 False-negative rate of axillary ultrasound (AUS) depending on extension of nodal involvement (n = 166)

From: Accuracy of axillary ultrasound in preoperative nodal staging of breast cancer - size of metastases as limiting factor

  nodal-positive AUS positive AUS negative p
  n n n %  
Nodal metastasis size *      <0.001
≤5 mm 41 4 37 90.2  
5.1-10 mm 46 19 27 58.7  
>10 mm 76 55 21 27.6  
Number of metastatic involved lymph nodes      <0.001
N1 (1–3) 86 27 59 68.6  
N2 (4–9) 48 28 20 41.7  
N3 (≥10) 32 24 8 25.0  
Capsular infiltration      <0.001
No 83 23 60 72.3  
Yes 83 56 27 32.5  
  1. * 3 missing value.