MR Imaging (IMAGE) Radiological Society of North America Caption Mammography and MR imaging in a 46-year-old woman with a palpable mass in the right breast. A: Mediolateral oblique (left) and spot compression (right) mammograms in the right breast show a mass in the upper-outer quadrant. B: Sagittal dynamic breast MR images in the right breast show an en-hancing mass with speculated, or spiky, margins in the right upper outer quadrant, an additional focus near the nipple (DCIS), and nonmass enhancement in the inferior quadrants (DCIS). The additional lesions were not visible at US and were biopsied with MR imaging guidance. Credit Radiological Society of North America Usage Restrictions May use with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.