Stephen D. Cassivi, M.D., M.S. is a thoracic surgeon at Mayo Clinic specializing in minimally invasive care for thoracic cancers and complex chest conditions. He focuses on helping people achieve safe, effective outcomes with the least invasive approach possible. His expertise includes lung cancer surgery, esophageal cancer resections, treatment of large hiatal hernias, surgical care for myasthenia gravis with or without thymoma, and complex mediastinal tumors such as thymomas and neurogenic tumors. Dr. Cassivi is known for thoughtful surgical decision-making, close collaboration with multidisciplinary teams, and a strong commitment to quality, outcomes, and patient-centered care.