Breast MR imaging lexicon updated.

The American College of Radiology Breast Imaging and Reporting Data System MR imaging lexicon incorporates morphologic and kinetic features of lesions identified on breast MR imaging. This brief article is aimed at introducing this material and should not be used as a definitive guide. Because the breast MR imaging lexicon is a work in progress, there are many areas that need exploring and better characterization. It is hoped that the radiologist uses the terms and concepts presented here as a template to which future lexicon terminology can be added.