Dr. Cassivi is a thoracic surgeon at Mayo Clinic’s Rochester campus and serves as Vice Chair of the Department of Surgery. He specializes in minimally invasive surgical techniques to treat lung cancer, esophageal cancer, as well as other conditions such as achalasia, myasthenia gravis and thymic tumors. Dr. Cassivi's research looks into surgical quality and outcomes as well as tissue and organ regeneration. Procedures performed by Dr. Cassivi include esophageal reconstruction, esophagectomy, heller myotomy, hyperhidrosis surgery, lung volume reduction surgery, minimally invasive surgery, robotic lobectomy, robotic surgery, VATS, VATS lobectomy and video mediastinoscopy. He received his medical degree from the University of Ottawa. U.S. News & World Report consistently ranks Mayo Clinic among the top hospitals for Cancer in the nation.