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Table 2 Sonographic features of MUMPC, cPMBC, and MMBC

From: The sonographic findings of micropapillary pattern in pure mucinous carcinoma of the breast

Features MUMPC (n = 17) cPMBC (n = 43) MMBC (n = 28) Significance
Shape     χ2 = 2.562, p = 0.278
 Regular 3 14 5  
 Irregular 14 29 23  
Orientation     F = 1.801, p = 0.450
 Parallel 16 42 28  
 Not parallel 1 1 0  
Margin     χ2 = 2.421, p = 0.307
 Circumscribed 2 13 6  
 Non-circumscribed 15 30 22  
Echogenicity     F = 18.418, p = 0.007
 Hyperechoic 0 1 1  
 Complex echogenicity 6 14 7  
 Hypoechoic 5 5 15  
 Isoechoic 6 18 5  
 Heterogeneous 0 5 0  
Posterior acoustic features     F = 10.588, p = 0.037
 No features 2 5 6  
 Enhancement 15 38 17  
 Shadowing 0 0 3  
 Combined pattern 0 0 2  
Calcification     χ2 = 14.889, p = 0.001
 Present 5 6 16  
 Absent 12 37 12  
 Vascularity     χ2 = 7.556, p = 0.023
 Present 7 17 20  
 Absent 10 26 8  
Blood flow grade     F = 10.866, p = 0.045
 0 10 26 8  
 1 7 15 15  
 2 0 0 3  
 3 0 2 2  
BI-RADS category     F = 26.427, p < 0.001
 3 2 9 0  
 4 13 31 12  
 5 2 3 16  
  1. F Fisher’s exact test