Breast imaging-reporting and data system (BI-RADS) assessment category 1

Last revised by David Luong on 27 Jun 2021

BI-RADS 1 is one of seven categories from the breast imaging reporting and data system. It is defined as negative and is used when imaging demonstrates:

  • no finding is present in an imaging modality (not even a benign finding) 
  • there is nothing to comment on
  • a normal examination

The likelihood of malignancy with a BI-RADS 1 classification is essentially 0% and the recommended management is for the patient to continue with routine mammography screening3

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