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

The author has no funding or conflicts of interest to disclose.

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

Reprints: Rajal B. Shah, MD, Dr Charles T. Ashworth Professor of Pathology, Department of Pathology, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390 (e-mail: [email protected]).