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As a radiation and medical oncologist, as well as an NIH-funded researcher, Hahn brings his many skills and talents to lead one of the nation’s foremost academic radiation oncology departments. He is an active clinician, with particular expertise in treating lung and genitourinary cancers and in the use of photodynamic therapy. As Vice Chair for Research for the department of radiation oncology and Principal Investigator of National Cancer Institute grants, Hahn has led the expansion of the department’s research base, which has consistently ranked first or second in NIH funding.
Prior to joining Penn in 1996, Hahn was a medical and radiation oncologist in Santa Rosa, California. From 1993-95, he served as chief of the National Cancer Institute’s Prostate Cancer Clinic, Clinical Pharmacology Branch, in Bethesda, Maryland, and as a senior investigator at the NCI. Hahn also served as a commander in the NCI’s U.S. Public Health Service from 1989-95. A long-standing member of the American Society of Clinical Oncology, Hahn is also an active member of the Radiation Research Society, the American Society of Photobiology, the American Association for Cancer Research, and the University’s John Morgan Society.