*Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, TX

†Department of Pathology and Michigan Center for Translational Pathology, University of Michigan School of Medicine, Ann Arbor, MI

The authors have no funding or conflicts of interest to disclose.

All figures can be viewed online in color at www.anatomicpathology.com

Reprints: Rohit Mehra, MD, Professor of Pathology, University of Michigan, Department of Pathology, 2800 Plymouth Road, Building 35, Ann Arbor, MI 48109 (e-mail: [email protected]); Rajal B. Shah, MD, Charles T. Ashworth Professor of Pathology, Department of Pathology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, Texas 75390 (e-mail: [email protected]).