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Table 9 BI-RADS categorization at MRI of previous mammographic and ultrasound findings

From: Magnetic resonance imaging in diagnosis of indeterminate breast (BIRADS 3 & 4A) in a general population

  Findings at previous examinations BI-RADS at MRI
  1 2 3 4 5
BI-RADS* 3       
Mammographic findings       
Asymmetry 9 2 6 1   
Nodule 4 1 3    
Multiple nodules 1   1    
Microcalcifications 1     1  
Ultrasound findings       
Solid nodule 36 2 30 1 3  
Multiple nodules 17   15 1 1  
Complicated cyst 13   13    
Cluster of microcysts 5   5    
Ductal ectasia 1   1    
Asymmetry 1   1    
BI-RADS 4A       
Mammographic findings       
Asymmetry 2 1 1    
Nodule 3   2   1  
Multiple nodules 2 1 1    
Segmental calcifications 1 1     
Ultrasound findings       
Solid Nodule 27 1 15 3 5 3
Multiple nodules 1   1    
Ductal ectasia 3   1 1 1  
Complicated cyst 1 1     
Intraductal papilloma 1   1    
Asymmetry 2   2    
  1. *Breast imaging-reporting and database system