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Journal of Korean Society of Ultrasound in Medicine 2009;28(3): 147-153.
Non-Mass Image-Forming Low Echoic Areas on Breast US: Pathologic Correlation.
Jee Won Park, Jin Hwa Lee, Eun Kyung Kim, Yeong Mi Park, Myongjin Kang, Jin Han Cho, Seong Kuk Yoon, Kyung Jin Nam, Se Heon Cho, Dae Cheol Kim
1Department of Radiology, Dong-A University College of Medicine, Korea. jhrad@dau.ac.kr
2Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Korea.
3Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Korea.
4Department of Surgery, Dong-A University College of Medicine, Korea.
5Department of Pathology, Dong-A University College of Medicine, Korea.
  Published online: September 1, 2009.
ABSTRACT
PURPOSE: We wanted to analyze the mammographic and clinical findings of the non-mass image-forming low echoic areas seen on breast ultrasonography (US) and investigate their pathologic results. MATERIALS AND METHODS: Sixty-nine patients with 72 non-mass image-forming low echoic areas seen on breast US and who had undergone mammography and biopsy were included in this study. The mammographic findings were divided into 2 groups: 1) the negative or probably benign group and 2) the suspicious for malignancy group. The US findings were divided into 3 groups: focal, segmental and diffuse distributions. The clinical findings were divided into 2 groups: the non-palpable and palpable groups. We investigated the pathologic results according to each group. RESULTS: Of the 72 lesions, 49 (68.1%) were benign and 23 (31.9%) were malignant. On the mammography, 42 (93.3%) of the 45 negative or probably benign findings and 7 (25.9%) of 27 suspicious for malignancy findings were pathologically benign (p < 0.001). On the US, 38 (76%) of the 50 focal distributions and 11 (52.4%) of 21 segmental distributions were benign (p = 0.090). Thirty (73.2%) of the 41 nonpalpable lesions and 19 (61.3%) of the 31 palpable lesions were benign (p = 0.609). CONCLUSIONS: A non-mass image-forming low echoic area seen on breast US was malignant at a higher rate when it was found in conjunction with suspicious mammographic finding. There was no significant correlation between the distribution of the non-mass image-forming low echoic areas on US or their palpability and the pathologic results.
Keywords: Breast, US; Breast, radiography; Breast, diseases Biopsies
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