Scoring System to Stratify Malignancy Risks for Mammographic Microcalcifications Based on Breast Imaging Reporting...

Area of Science:

• Radiology
• Oncology
• Medical Imaging

Background:

• Mammographic microcalcifications are common findings, requiring accurate risk assessment for malignancy.
• The Breast Imaging Reporting and Data System (BI-RADS) provides a framework, but further stratification of microcalcification risk is needed.

Purpose of the Study:

• To develop and validate a scoring system for stratifying malignancy risk of mammographic microcalcifications.
• To enhance the diagnostic performance of the 5th edition of BI-RADS for microcalcifications.

Main Methods:

• Retrospective review of 194 microcalcification lesions with surgical excision.
• Independent assessment by two radiologists using BI-RADS 5th edition criteria.
• Development of a scoring system using multivariate logistic regression and validation on an external dataset.

Main Results:

• The developed scoring system demonstrated significant differences in scores between benign and malignant lesions (p < 0.001).
• The area under the receiver operating characteristic curve (AUROC) for the scoring system was 0.874, with validation showing 0.905.
• Positive predictive values (PPVs) for BI-RADS categories were refined by the scoring system, ranging from 0% for category 3 to 100% for category 5.

Conclusions:

• A scoring system based on BI-RADS morphology and distribution descriptors can effectively stratify malignancy risk in mammographic microcalcifications.
• This system offers improved risk stratification beyond standard BI-RADS categories.
• The validated scoring system aids in differentiating benign from malignant microcalcifications, potentially optimizing patient management.