1. From the Departments of Surgical Oncology, Pathology, Diagnostic Radiology, Clinical Cancer Prevention, Radiation Oncology, and Breast Medical Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX; Department of Pathology and Laboratory Medicine, University of California, Davis; Department of Radiology, University of California, San Francisco, CA; and the Department of Surgery, University of Pennsylvania School of Medicine, Philadelphia, PA