Outcomes of US BI-RADS 4A, 4B, and 4C Lesions.
- Author:
Jae Wang SHIN
1
;
Eun Young KO
;
Boo Kyung HAN
;
Jung Hee SHIN
;
Seok Seon KANG
;
Soo Yeon HAHN
Author Information
1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
- Publication Type:Original Article
- Keywords:
Breast;
BI-RADS, Inter-observer variability, Ultrasound (US)
- MeSH:
Biopsy;
Breast;
Humans;
Retrospective Studies
- From:Journal of the Korean Society of Medical Ultrasound
2009;28(4):275-279
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: The aim of our study was to evaluate the outcomes of sonographic (US) BIRADS category 4 lesions according to subcategories 4A, 4B, and 4C and palpability. MATERIALS AND METHODS: We retrospectively reviewed the pathology results of 512 US BI-RADS category 4 lesions in 460 patients after ultrasound-guided percutaneous biopsy (n = 435) and surgical biopsy (n = 77). We analyzed the results according to subcategories 4A, 4B, 4C, and palpability, and compared outcomes of five breast radiologists. RESULTS: In BI-RADS 4A lesions (n = 302), biopsy results indicated 48 malignancies (15.9%). In BI-RADS 4B lesions (n = 113), biopsy revealed 69 malignancies (61.1%). Among BI-RADS 4C lesions (n = 97), 87 lesions were malignancies (89.7 %). Palpability had no correlation with the rate of malignancy in BI-RADS category 4 lesions, and the rate of malignancy for category 4A ranged widely from 8.1% - 26.4%. CONCLUSIONS: The outcomes of US BI-RADS category 4 lesions according to subcategories varied widely between radiologists, especially for 4A lesions. The US finding itself warrants a BI-RADS 4 subcategory. In category 4 lesions, the malignant rate was the same between palpable and nonpalpable lesions.
