Mahul B. Amin, MD is the returning lead author from the previous edition. He is currently Professor and Chairman of Pathology at the University of Tennessee Health Science Center and the Endowed Chair for Cancer Research. His is board certified by the American Board of Pathology in both Anatomic and Clinical Pathology. Dr. Amin was the Editor in Chief of the 8th Edition AJCC TNM Staging Manual, as well as the Editor in Chief of Advances in Anatomic Pathology. His special research interests include urological cancer, quality assurance and improvement, laboratory medicine, and molecular pathology.