Benign (BI-RADS 2) lesions in breast MRI

Area of Science:

• Radiology
• Oncology
• Medical Imaging

Background:

• Breast MRI is a crucial tool for breast cancer detection.
• The Breast Imaging-Reporting and Data System (BI-RADS) categorizes findings to standardize reporting.
• BI-RADS 2 indicates benign findings, but malignancy assessment is essential.

Purpose of the Study:

• To determine the frequency of malignancy in breast lesions classified as BI-RADS 2 on MRI.
• To evaluate the necessity of biopsies for BI-RADS 2 lesions.

Main Methods:

• Retrospective analysis of 192 breast lesions classified as BI-RADS 2 on MRI.
• Lesions were assessed via histopathology or a minimum 2-year imaging/clinical follow-up.
• Data from 1265 consecutive patients undergoing breast MRI were reviewed.

Main Results:

• None of the 192 BI-RADS 2 lesions were malignant (0%).
• Histopathology confirmed benign findings in 34.9% of lesions.
• The remaining 65.1% showed no changes during follow-up, indicating benignancy.

Conclusions:

• Breast lesions classified as BI-RADS 2 on MRI have a zero frequency of malignancy.
• Biopsies are unnecessary for BI-RADS 2 breast lesions, simplifying patient management.