Magnetic Resonance Imaging of Breast Cancer

INCLUSION CRITERIA * Female * Documented breast physical examination, * Documented mammography within 3 months of the MR studies * Palpable or mammographically-detected suspect breast lesions * Women who have already undergone lumpectomy for breast cancer and have post-biopsy/post-radiation changes will be eligible if they have mammographically-detected or palpable breast abnormalities which are sufficiently suspicious to merit core needle or surgical biopsy. EXCLUSION CRITERIA: * Male by birth * Able to complete the MR examination. Subjects will be interviewed by one of the investigators for the usual contraindications to * MR contraindications including * Pacemakers * Metallic implants * Severe claustrophobia * Aneurysm clips * Pregnancy * Current lactation * Other conditions precluding proximity to a strong magnetic field. * Received an enhanced MR procedure within 48 hours, * Iodinated contrast within six hours, * Known sensitivity to MR contrast agents, * Not likely to complete the study in full or * Other clinical reason which would preclude participation in the protocol.