Breast imaging-reporting and data system (BI-RADS) assessment category 2

Last revised by Dr MT. Niknejad on 07 Aug 2022

BI-RADS 2 is a benign category in breast imaging reporting and data system. A finding placed in this category should have a 100% chance of being benign. 

Examples of such lesions or findings include:

Reporting recommendations

Although BI-RADS 1 and BI-RADS 2 both denote an essentially zero chance of malignancy, BI-RADS 1 is used in situations where the breast is completely unremarkable, and BI-RADS 2 is used when the radiologist wants to remark on a benign finding.

Any BI-RADS 2 breast finding is not expected to change over the follow-up interval. The radiologist should mention that it is a definite benign lesion.

Usual screening follow-up is recommended.

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Cases and figures

  • Case 1:sebaceous cyst
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  • Case 2: simple cyst
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  • Case 3: fat necrosis
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  • Case 4: breast hamartoma
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  • Case 5: oil cyst
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