I am a board-certified medical oncologist with clinical and research interests in the field of gastrointestinal malignancies. My clinical practice includes care of patients with gastrointestinal cancers, neuroendocrine tumors, and cancers of unknown primary site. I am an attending physician on the Gastrointestinal Oncology Service, which I was privileged to lead as Chief from 1991 to 2011. I also serve... Read More about David Paul Kelsen, MD - MSK Gastrointestinal Oncologist