Sean Williamson MD

Dr. Sean R. Williamson, MD, is the Vice Chair of Education in the Department of Pathology and Laboratory Medicine of the Cleveland Clinic Diagnostics Institute. He is also a Professor of Pathology at the Cleveland Clinic Lerner College of Medicine. Originally from Pittsburgh, Pennsylvania, he studied medicine at Temple University School of Medicine in Philadelphia, Pennsylvania, followed by residency and genitourinary pathology fellowship training at Indiana University School of Medicine, Indianapolis, Indiana. Before joining the Cleveland Clinic, he practiced in the Henry Ford Health System in the Detroit Metro area, where he was selected by the trainees as the Anatomic Pathology Teacher of the Year 4 times.

Williamson is currently Editor-in-Chief of the International Journal of Surgical Pathology. He has contributed to more than 150 peer-reviewed journal articles and is a co-author of the textbook Atlas of Genitourinary Pathology: A Pattern-Based Approach. He is a lead author for multiple sections (urinary bladder, kidney, and mesenchymal tumors) in the 5th edition of the World Health Organization Classification of Tumors of the urinary system and is a coauthor of the 5th series AFIP text on tumors of the testis and paratesticular structures. He currently serves on the editorial boards of several journals, including Modern Pathology and Histopathology, and is the recipient of the 2024 Arthur Purdy Stout Society Annual Prize. His research is focused on diagnostic, prognostic, and staging challenges in surgical pathology, with emphasis on recognizing novel tumor histologic features that correlate with underlying molecular events and significance for patient outcome.