He completed a cardiothoracic surgery fellowship at the University of Toronto. Dr. Mentzer also completed a research fellowship at Dana-Farber Cancer Institute where he investigated the molecular mechanisms involved in the regulation of T lymphocyte function. He is board certified in surgery, cardiothoracic surgery, and surgical critical care. Dr. Mentzer’s clinical interests include diseases of the lungs and thoracic cancers, minimally invasive surgery of the lungs and esophagus, and minimally invasive surgery for esophageal cancer. Principal investigator for The Mentzer Lab, Dr. Mentzer is currently studying the adaptive processes involved in blood vessel growth (angiogenesis) and lung regeneration.