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J Clin Ultrasound. 2011 Jun;39(5):248-55. doi: 10.1002/jcu.20815. Epub 2011 Apr 5.

Metastases to the breast from extramammary malignancies−sonographic features.

Author information

1
Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Seocho-Gu, Seoul 137-701, Korea.

Abstract

PURPOSE:

To evaluate the clinical and sonographic (US) features of metastatic tumors from extramammary malignancies to the breast.

METHODS:

This study included 23 patients with pathologically proven metastases in the breast. Two radiologists retrospectively analyzed the images from US (n = 23), mammography (n = 11), and MRI (n = 5) examinations according to BIRADS.

RESULTS:

Patients presented with a palpable mass or diffuse breast swelling (21/23) or were asymptomatic (2/23). Eighteen patients had solitary or multiple breast masses on US. The common US finding was an ovoid hypoechoic mass with a noncircumscribed margin. The final assessment categories were BIRADS 3 (probably benign finding) in 6 cases (25%) and BIRADS 4 (suspicious abnormality) in 18 cases (75%). In five patients, US displayed a diffuse infiltrative pattern without a focal lesion, which was categorized as BIRADS 4.

CONCLUSIONS:

Metastatic tumors in the breast have a wide range of sonographic appearances, with some resembling benign lesions. Any newly developed mass in a patient with a known history of extramammary malignancy, even with a probably benign US appearance, should undergo biopsy for pathologic confirmation.

PMID:
21469153
DOI:
10.1002/jcu.20815
[Indexed for MEDLINE]

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