1 From the Department of Pathology, University of Pittsburgh Medical Center, Presbyterian Hospital, Pittsburgh, Pennsylvania (Dr Chiosea); the Department of Pathology, University Health Network, Toronto, Ontario, Canada (Dr Asa); the Department of Pathology, Jefferson Hospital, Allegheny Health Network, Jefferson Hills, Pennsylvania (Dr Berman); the Department of Surgery, Division of Endocrine Surgery (Dr Carty), and Department of Pathology (Drs Nikiforov and Seethala), University of Pittsburgh, Pittsburgh, Pennsylvania; Cancer Registrar at North Kansas City Hospital, North Kansas City, Missouri (Ms Currence); the Division of Endocrinology and Metabolism, New York University Langone Medical Center, Tisch Hospital, New York (Dr Hodak); the Department of Pathology, Medical University of South Carolina, Charleston (Dr Richardson); the Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts (Dr Sholl); the Department of Pathology, Southern California Permanente Medical Group, Woodland Hills, California (Dr Thompson); the Department of Pathology and Laboratory Medicine, Beth Israel Medical Center, St. Luke's and Roosevelt Hospitals, New York, New York (Dr Wenig); and the Department of Internal Medicine, Comprehensive Cancer Center, University of Michigan, Ann Arbor (Dr Worden).