Bilateral breast MR imaging: is it superior to conventional methods for the detection of contralateral breast cancer?

Background: Breast MR imaging has emerged as a highly sensitive modality for the imaging of breast tumors. However, there have been no reports concerning the usefulness of bilateral breast MRI to evaluate the contralateral breast in Japan. The purpose of this study was to examine the frequency of primary bilateral breast cancer, and to investigate the role of bilateral breast MRI in the detection of contralateral breast cancer.

New preoperative MRI marking technique for a patient with ductal carcinoma in situ.

We herein present a case of non-palpable ductal carcinoma in situ (DCIS) treated with successful breast-conserving surgery (BCS) using MR markers made with commercially available materials in the supine position. The patient was a 40-year-old woman found to have a non-mass lesion by routine screening ultrasonography (US). The margin of the lesion was unclear by the US examination, whereas contrast-enhanced MR mammography (MRM) revealed a clear margin of the lesion.

Categorization of non-mass-like breast lesions detected by MRI.

Background: Breast MR imaging has emerged as a highly sensitive modality for the imaging of breast tumors. However, a standardized method of interpretation of lesions showing non-mass-like enhancement does not exist. The purpose of this study was to analyze the features of non-mass-like breast lesions detected by MRI, and to establish a standardized method of interpretation to allow categorization of these lesions.