Departments of Pathology and Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD

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

Reprints: Lisa M. Rooper, MD, The Johns Hopkins Hospital, 401 N. Broadway, Weinberg 2242, Baltimore, MD 21231 (e-mail: [email protected]).

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