3.2 Preoperative Imaging: All patients will have preoperative mammography +/- ultrasound of the breast. Patients eligible for and consenting to the study will be referred to the Cross Cancer Institute by their surgeons and will have preoperative PET scanning. Imaging will be completed within seven days prior to surgery. Once a PET scanner becomes available in Calgary, the scans will be done there. Potential sites of distant metastases identified by PET scan will be imaged further and if necessary, possible biopsies will be obtained to confirm the diagnosis.