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

Last revised by Mohammad Taghi Niknejad ◉ on 2 Dec 2024

Citation, DOI, disclosures and article data

Citation:

Radswiki T, Niknejad M, Ranchod A, et al. Breast imaging-reporting and data system (BI-RADS) assessment category 2. Reference article, Radiopaedia.org (Accessed on 29 Mar 2025) https://doi.org/10.53347/rID-13953

DOI:

https://doi.org/10.53347/rID-13953

Permalink:

https://radiopaedia.org/articles/13953

rID:

13953

Article created:

3 Jun 2011, The Radswiki ◉

Disclosures:

At the time the article was created The Radswiki had no recorded disclosures.

View The Radswiki's current disclosures

Last revised:

2 Dec 2024, Mohammad Taghi Niknejad ◉

Disclosures:

At the time the article was last revised Mohammad Taghi Niknejad had no financial relationships to ineligible companies to disclose.

View Mohammad Taghi Niknejad's current disclosures

Revisions:

28 times, by 15 contributors - see full revision history and disclosures

Systems:

Breast

Sections:

Classifications

Tags:

breast, mammography, classification, bi-rads classification

Synonyms:

BIRADS II
BIRADS 2
BIRADS 2 lesion
BIRADS II lesion
BI-RADS II lesion
BI-RADS 2 lesion
BI-RADS 2
BI-RADS II

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:

calcified fibroadenomas
multiple secretory calcifications
fat-containing lesions such as:
- oil cysts
- breast lipomas
- galactoceles
- mixed density hamartomas
cutaneous neurofibromas ³: e.g. in neurofibromatosis type I (evidence of sarcomatous change is considered very low)
intramammary lymph nodes
breast sebaceous cysts
simple breast cysts ⁴
breast implants

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.