Undetected malignancies of the breast: dynamic contrast-enhanced MR imaging at 1.0 T.

Purpose: To assess the prevalence and characteristics of malignant breast lesions not identified with magnetic resonance (MR) imaging.

Materials And Methods: Breast tissue specimens were obtained in 464 of 967 patients who had undergone dynamic gadolinium-enhanced T1-weighted fast low-angle shot three-dimensional MR imaging of both breasts. A comparison of sensitivity, specificity, and predictive values of the prospectively recorded findings of mammography, ultrasonography (US), and MR imaging with the histopathologic results was performed with receiver operating characteristic (ROC) curve analysis.