Dr. Hahn obtained his MD degree with honors from Temple University in Philadelphia and then trained first in Medicine at the University of California, San Francisco, where he was Chief Resident in 1987-88. Dr. Hahn completed a Medical Oncology training program at the National Cancer Institute. He is board certified Internal Medicine, Medical Oncology and Radiation Oncology. Dr. Hahn joined the University of Pennsylvania’s School of Medicine in 1996 as an Assistant Professor of Radiation Oncology. He was promoted to full Professor and became Chairman of the Department in August 2005.

Dr. Hahn’s clinical expertise’s are in the areas of lung cancer, mesothelioma, prostate cancer and soft tissue sarcoma. Due to his remarkable background in internal medicine, medical oncology and radiation oncology, Dr. Hahn has an extraordinary breadth and depth of view, and is sought after for referrals on cases by physicians throughout the Philadelphia region.

Dr. Hahn has been heavily involved teaching residents in the Radiation Oncology program, and was awarded the Guilio D’Angio Award for Excellence in Teaching by the Department of Radiation Oncology. He also serves as a mentor to many of the junior physicians in the department, taking an active interest in their careers

Dr. Hahn’s major areas of research include Photodynamic Therapy and Farnyltransferase Inhibitors, used for the treatment of lung, head and neck and pancreatic cancers. Additionally, Dr. is part of the program to bring the hypoxia detecting agent, EF5 into clinical trials. He has directed the Phase I and II trials of this agent and is now assisting in the development of EF5 as an imaging agent.