reported that MRI could detect clinically and mammographically occult breast cancer in the contralateral breast in 3.1% (30/969) of women with newly diagnosed breast cancer. concluded that MRI screening of women with a history of familial or hereditary breast cancer can achieve a significantly higher sensitivity and a more favorable stage of detection than mammography. 2īreast MRI can alter the clinical management for a sizable fraction of women with early-stage breast cancer, and helps in determining the optimal local treatment. 1 For women with a 15 to 20% lifetime risk, based on the analysis of multiple risk factors such as a personal history of breast cancer, carcinoma in situ, atypical hyperplasia, and extremely dense breasts on mammography, the ACS suggested that the screening decisions should be made on a case by case basis. MRI is recommended as an adjunct to mammography for women with lifetime risk of 20–25% or greater, which include women with a strong family history of breast or ovarian cancer and women who had been treated for Hodgkin disease. In March 2007 the American Cancer Society (ACS) issued a new guideline recommending annual screening for high-risk women using breast magnetic resonance imaging (MRI). This may in turn help physicians and patients to jointly select an appropriate management protocol for each patient’s clinical situation. Using this common language, a comprehensive analysis of both morphological and kinetic features used in image interpretation will help radiologists and other clinicians to communicate more clearly and consistently. The purpose is to familiarize all medical professionals with the breast MRI lexicon, since the use of this imaging modality is rapidly growing in the field of breast disease. In this article, we will review various appearances of breast lesions on MRI using the standardized terms of ACR BI-RADS MRI lexicon. To standardize the communication language, the Breast Imaging-Reporting and Data System (BI-RADS) MRI lexicon was developed by the American College of Radiology (ACR). The diagnosis of breast MRI involves the description of morphological and enhancement kinetics features. This guideline is expected to substantially increase the number of women each year who receive breast MRI. In March 2007, the American Cancer Society (ACS) issued a new guideline recommending annual MRI screening for high-risk women. In recent years, dynamic contrast enhanced MRI (DCE-MRI) has altered the clinical management for women with breast cancer.
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