Categorization and Evaluation of Usefulness of Breast Lesions with using Ultrasound BI-RADS (Breast Imaging Reporting and Data system).
10.3348/jkrs.2006.54.4.313
- Author:
Youn Jeong KIM
1
;
Hye Young CHOI
;
Byung In MOON
;
Shi Nae LEE
Author Information
1. Department of Radiology, Ewha Womans University College of Medicine, Korea. choihy@ewha.ac.kr
- Publication Type:Original Article
- Keywords:
Breast, disease, Breast, Ultrasound (US)
- MeSH:
Breast*;
Humans;
Sensitivity and Specificity;
Ultrasonography*
- From:Journal of the Korean Radiological Society
2006;54(4):313-318
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: The aim of our study was to determine the positive predictive value (PPV) and to evaluate the usefulness of ultrasound BI-RADS, as compared with the histologic results of breast lesions that were categorized and classified by the ultrasound BI-RADS lexicon. MATERIALS AND METHODS: Between January and December 2004, the ultrasound features of 471 breast lesions in 368 patients were analyzed and categorized with using ultrasound BI-RADS. All of the lesions were compared with the histological results. We categorized category 2 and 3 lesions as benign lesions, and category 4 and 5 lesions as malignant lesions. We then calculated the sensitivity, specificity, positive predictive value, negative predictive value and accuracy. RESULTS: The breast lesions were histologically diagnosed as 298 cases of category 2, 21 cases of category 3, 108 cases of category 4 and 44 cases of category 5. The categorical malignancy rate was 1% (3/298) in category 2 lesions, 4.7% (1/21) in category 3 lesions, 8.3% (9/108) in category 4 lesions and 90.9% (40/44) in category 5 lesions. Within category 4, the malignancy rate for category 4a lesions was 5.4% (5/92), the malignancy rate for category 4b lesions was 1.3% (1/8) and the malignancy rate for category 4c lesions was 50% (4/8). The sensitivity, specificity, positive predictive value and negative predictive value were 90.6%, 75.1%, 31.6% and 98.4%, respectively. The statistically valid ultrasound features that were correlated with malignancy were an ill defined margin, a microlobulated mass, an irregular mass, inhomogenic echogenicity, an echogenic halo and an older patient age. CONCLUSION: Ultrasound BI-RADS was useful in differentiating benign from malignant breast lesions.
