John Charlson, MD Local Control Working Group Medical College of Wisconsin Dr. Charlson is a sarcoma medical oncologist at the Medical College of Wisconsin, in Milwaukee, Wisconsin. He has been caring for sarcoma patients since 2007, after receiving his M.D. from the University of Iowa and completing an Internal Medicine residency and Oncology fellowship at the Medical College of Wisconsin. He is an active investigator in sarcoma clinical trials and serves as co-director of the AYA cancer program.