Dr. Charles Guo is Professor of Pathology and Chief of Genitourinary (GU) Pathology Section at the University of Texas MD Anderson Cancer Center.

He graduated from Qingdao University Medical College and received graduate training at Chinese Academy of Medical Sciences. After pathology residency training at New York University Medical Center, he had additional fellowship training in GU pathology with Dr. Jonathan Epstein at Johns Hopkins Hospital. He joined the Department of Anatomic Pathology at MD Anderson Cancer Center in 2006. At MD Anderson, he is specialized in GU pathology, covering a wide range of neoplastic diseases in the GU system. His current research is to study molecular classification of bladder cancer and genomic alterations in bladder cancer histologic variants. Dr. Guo has published over 140 peer-reviewed papers, edited two books, and contributed numerous book chapters. He is a contributor to the 2016 and 2022 WHO GU Classification Books.

Dr. Cai is a Professor of Pathology and the Associate Director of Cytopathology at the Department of Pathology, Yale University School of Medicine.

He completed his residency in Anatomic and Clinical Pathology at New York University Medical Center, where he also completed a fellowship in cytopathology. He is a board-certified pathologist and cytopathologist. Dr. Cai's research focuses on molecular testing in fine needle aspiration biopsy, and biomarker studies in lung, pancreas, thyroid and bladder cancers. He has published almost 120 peer-reviewed articles.