Practical Considerations for the Use of Breast MRI for Breast Cancer Evaluation in the Preoperative Setting.

Preoperative contrast-enhanced (CE) breast magnetic resonance imaging (MRI) remains controversial in the newly diagnosed breast cancer patient. Additional lesions are frequently discovered in these patients with CE breast MRI. As staging and treatment planning evolve to include more information on tumor biology and aggression, so should our consideration of extent of disease. Directing CE breast MRI to those patients most likely to have additional disease may be beneficial. We sought to develop practical guidance for the use of preoperative CE breast MRI in the newly diagnosed breast cancer patient based on recent scientific data. Our review suggests several populations for whom preoperative breast MRI is most likely to find additional disease beyond that seen on conventional imaging. These can be viewed in three categories: (1) tumor biology-patients with invasive lobular carcinoma or aggressive tumors such as triple negative breast cancer (estrogen receptor negative, progesterone receptor negative, and human epidermal growth factor receptor 2 (HER2) negative) and HER2 positive tumors; (2) patient characteristics-dense breast tissue or younger age, especially those age <60; and (3) clinical scenarios-patients with more sonographic disease than expected or those who are node positive at initial diagnosis. Focusing breast MRI on patients with any of the aforementioned characteristics may help utilize preoperative breast MRI where it is likely to have the most impact.