Dr Craig Hacking and Radswiki et al.

A BIRADS IV lesion under the breast imaging reporting and data system refers to a suspicious abnormality. BIRADS IV lesions may not have the characteristic morphology of breast cancer but have a definite probability of being malignant. A biopsy is recommended for these lesions. If possible, the relevant probabilities should be cited so that the patient and her physician can decide on the ultimate course of action. BIRADS IV lesions can be further subclassified into:

  • BIRADS IVa: low level of suspicion for malignancy
  • BIRADS IVb: intermediate suspicion for malignancy
  • BIRADS IVc: moderate suspicion for malignancy
Breast imaging and pathology
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Article information

rID: 15151
System: Breast, Oncology
Synonyms or Alternate Spellings:
  • BIRADS iv
  • BIRADS 4
  • BIRADS iv lesion

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Cases and figures

  • Case 1: BIRADS IV on combined imaging
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  • Case 2
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