@entity3 to the breast from non-mammary @entity5 : XXXX , prevalence, clinical signs, and radiological features.

@entity5 @entity1 @entity1558 @entity3
RATIONALE AND OBJECTIVES: Most secondary intramammary @entity5 occur as metastatic involvement from the contralateral breast. Breast @entity3 (BM) from nonmammary @entity5 are very rare. The aims of this study were to estimate retrospectively the prevalence of BM from nonmammary @entity5 and to describe their radiologic appearance. MATERIALS AND METHODS: BM were identified in 51 @entity1 , including 43 @entity1 and eight @entity1 with a median age of 61 years (range, 24-84 years). Computed tomography of the thoracic region identified 108 lesions in 38 @entity1 . Mammography was available for 37 @entity1 (54 lesions). Ultrasound evaluation was performed in 43 @entity1 (71 lesions). In 24 @entity1 (93 lesions), magnetic resonance imaging of the breast was done. Images were reviewed in consensus by two radiologists according to the Breast Imaging Reporting and Data System lexicon. RESULTS: The prevalence of BM in several @entity5 ranged from 0.12% to 4.92%. On computed tomography, most @entity3 were round or oval in shape with marked or moderate enhancement. On mammography, solitary or multiple round or oval masses with circumscribed margins were the most common pattern of BM. Ten percent showed microcalcifications. On ultrasound, most BM were hypoechoic, oval or round in shape, with microlobulated or circumscribed margins, and posterior acoustic enhancement. Doppler imaging showed hypervascularity in 39% of BM. On magnetic resonance imaging, most lesions demonstrated marked homogenous contrast enhancement. Type 1 kinetic curve was seen in 18%, type 2 in 52%, and type 3 in 30%. CONCLUSIONS: The radiologic features reported in this study should be taken into consideration in the differential diagnosis of @entity1558 .
