1 From the Departments of Radiology (S.M.W., A.S., O.O., T.Z., B.A., H.S.), Pathology (C.W., J.A.B.), and Endocrinology (E.M.), Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115-6195; and Department of Imaging, Dana-Farber Cancer Institute, Boston, Mass (H.S.).