Antonio Lopez-Beltran is Director of Anatomic Pathology at the Champalimaud Clinical Center, Lisbon, Portugal, and Professor of Pathology at Cordoba University Medical School, Cordoba, Spain. Rodolfo Montironi is Professor of Pathology and Head of the Genitourinary Cancer Program at the Institute of Pathological Anatomy and Histopathology, Polytechnic University of the Marche Region (Ancona) School of Medicine, United Hospitals, Torrette, Ancona, Italy. Liang Cheng is Professor of Pathology and Urology, Director of Molecular Diagnostics and the Molecular Pathology Laboratory, Chief of the Genitourinary Pathology Division, and Director, Fellowship in Urologic Pathology at Indiana University School of Medicine, Indianapolis, IN, USA.