*Department of Pathology, University of Pittsburgh Medical Center (UPMC) Children’s Hospital of Pittsburgh, Pittsburgh, PA

Departments of †Pathology

‡Urology

§Oncology, Johns Hopkins School of Medicine, Baltimore, MD

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

Reprints: Eduardo Zambrano, MD, MSc, Department of Pathology, B256, One Children’s Hospital Drive, Pittsburgh, PA 15224 (e-mail: [email protected]).