 At the Cross Cancer Institute CCI a breast MRI protocol based on the technical procedures recommended in the literature and personal scanning experience has been developed. However, due to the limited number of patients undergoing breast MRI examinations, our current experience is limited relative to the level of expertise demonstrated in the interpretation of breast ultrasound and mammographic scans. Fortunately, we now have the opportunity to obtain MRI - pathology correlation as Dr. Kelly Dabbs is performing on site breast cancer surgery at the CCI. We propose to obtain an MRI examination of all consented patients prior to their surgical procedure. The MRI results of each patient will then be compared to previous breast imaging mammography and breast ultrasound and histopathological specimens to determine the correlative accuracy of MRI with these techniques. To assess whether the size, grade, and presence of lymphovascular invasion or associated ductal carcinoma in situ influence the accuracy of MR imaging, all breast carcinoma subtypes will be included in this study. 