Related Experiment Videos
Positive predictive value of the Breast Imaging Reporting and Data System.
M A Lacquement1, D Mitchell, A B Hollingsworth
1University of Oklahoma Institute for Breast Health, Department of Surgery, Oklahoma City 73104, USA.
Journal of the American College of Surgeons
|July 13, 1999
Summary
The Breast Imaging Reporting and Data System (BIRADS) effectively stratifies positive predictive values (PPV) for mammographic findings. This stratification improves risk assessment accuracy, distinguishing between benign and malignant lesions for better patient management.
Area of Science:
- Radiology and Medical Imaging
- Oncology and Breast Cancer Research
- Biostatistics and Health Outcomes
Background:
- The American College of Radiology established the Breast Imaging Reporting and Data System (BIRADS) for standardized outcomes monitoring.
- BIRADS guidelines mandate calculation of positive predictive values (PPV) and tracking of benign and malignant histology.
- This study analyzes data from 688 image-guided biopsies categorized using the BIRADS system.
Purpose of the Study:
- To evaluate the contribution of the BIRADS system in stratifying PPV, histology, and biopsy modality data.
- To assess the accuracy of risk stratification based on BIRADS assessment categories.
- To correlate BIRADS categories with specific histologic outcomes and biopsy techniques.
Main Methods:
- Retrospective analysis of 688 image-guided biopsies, with BIRADS ratings assigned either prospectively or retrospectively.
- Histologic outcomes were blinded to radiologists during retrospective BIRADS rating assignment.
- Positive predictive value (PPV) was calculated for each BIRADS category to assess malignancy likelihood.
Main Results:
- Overall PPV for the study sample was 0.23, with significant increases in PPV correlating with higher BIRADS categories (Category 5: 0.92).
- Biopsy distribution across categories: Category 1 (0.1%), Category 2 (3.6%), Category 3 (46.8%), Category 4 (34.0%), Category 5 (15.4%).
- Common benign diagnoses included fibroadenoma and fibrocystic changes; malignant diagnoses were predominantly infiltrating ductal carcinoma and ductal carcinoma in situ.
Conclusions:
- The BIRADS system enhances risk assessment by providing mammogram-specific PPVs, improving diagnostic specificity over general PPVs.
- Histology analysis confirmed fibrocystic changes for Category 3/4 benign biopsies and invasive ductal carcinoma for Category 5 lesions.
- Biopsy modality preference evolved from stereotactic core biopsy to vacuum-assisted biopsy for radiographically detected lesions during the study period.