Magnetic Resonance Imaging-Guided Core Needle Breast Biopsies Resulting in High-Risk Histopathologic Findings: Upstage Frequency and Lesion Characteristics

MRI-guided breast biopsies yielding high-risk histopathologic features were associated with an overall upstage to malignancy rate of 14% at surgical excision. All upstaged lesions were associated with ADH. FEA and ALH alone or with LCIS were not associated with an upstage to malignancy.