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Table 3 False-negative rate of axillary ultrasound (AUS) in different subgroups of 166 nodal-positive patients

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

  pN+ AUS positive AUS negative p
   n n %  
Age (years)      n.s.
≤50 28 16 12 42.9  
>50 138 63 75 54.3  
BMI      n.s.
<25 60 28 32 53.3  
25-29.9 59 24 35 59.3  
≥30 46 26 20 43.5  
Tumour stage      0.001
pT1 62 20 42 67.7  
pT2 81 42 39 48.1  
pT3 & pT4 23 17 6 26.1  
Histological subtype      n.s.
Ductal 128 66 62 48.4  
Lobular 16 5 11 68.8  
Others 22 8 14 63.6  
Grading      0.005
G1 6 1 5 83.3  
G2 88 34 54 61.4  
G3 72 44 28 38.9  
Lymphangiosis      0.001
No 33 7 26 78.8  
Yes 133 72 61 45.9  
Growth pattern      n.s.
Unifocal 139 65 74 53.2  
Multicentric 25 14 11 44.0  
ER status      0.024
Positive 129 55 74 57.4  
Negative 37 24 13 35.1  
PR status      0.014
Positive 109 44 65 59.6  
Negative 57 35 22 38.6  
HER2 status      0.007
Negative 150 66 84 56  
Positive 16 13 3 18.8  
Ki-67      <0.001
≤14% 38 9 29 76.3  
>14% 122 69 53 43.4  
Total 166 79 87 52.4  
  1. n.s. = not significant.