Dr. Marc Posner

Dr Marc Posner serves as the Medical Director of the Department of Radiation Oncology at Northwestern Lake Forest Hospital just north of Chicago. Originally from New York City, Dr Posner is Harvard trained and has over 17 years of experience practising as a Radiation Oncologist. His internship was completed in the University of Chicago Hospital system, followed by a residency at the University of California in San Francisco, serving as the Chief Resident in 1999.

Dr Posner joined the Lake Forest Hospital staff in 2000. His special interests include highly conformal radiotherapy with IMRT, VMAT, and IGRT as well as stereotactic radiotherapy and radiosurgery (SBRT/SRS). He is an expert in the treatment of prostate cancer, as well as malignancies of the head and neck, gastrointestinal tract, breast, brain and lung, all of which are best approached with these newest radiation techniques. He has additional training and experience in the treatment of other cancers, and constantly works to improve outcomes and reduce side effects. He has lectured both nationally and internationally on the use of advanced radiotherapy techniques in the treatment of prostate, head and neck, breast, and other cancers.

He is happily married with twin children and twin dogs (a pair of pairs!).