Dr. Ramon A. Riojas

Mark Nelson, MD, specializes in cardiothoracic surgery and is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. He practices at UPMC Heart and Vascular Institute and is affiliated with UPMC Shadyside and UPMC Presbyterian. Dr. Nelson completed his fellowship and residency at West Virginia University School of Medicine and medical education at University of Maryland School of Medicine. Dr. Nelson is highly rated in 22 conditions, according to our data. His top areas of expertise are Thoracic Aortic Aneurysm, Carotid Artery Disease, Abdominal Aortic Aneurysm (AAA), Carotid Artery Surgery, and Heart Bypass Surgery.

Neil A. Christie, MD, is an assistant professor of surgery in the Department of Cardiothoracic Surgery and director of LIFE Bronchoscopy and Early Lung Cancer Detection Program. He specializes in select areas of thoracic surgery including minimally invasive thoracic surgery, antireflux surgery, fluorescent bronchoscopy, and thoracic stereotactic radiosurgery. Dr. Christie is board-certified in thoracic surgery. He received an undergraduate degree from Queen's University, Kingston, Ontario. He then completed a medical degree at the University of Toronto. Dr. Christie completed a residency in cardiothoracic surgery at the Cleveland Clinic, Cleveland, Ohio, and a fellowship in minimally invasive thoracic surgery at the University of Pittsburgh School of Medicine. Dr. Christie is a member of the Canadian Medical Association, American College of Surgeons, American Medical Association, and the Society of American Gastrointestinal Endoscopic Surgeons. Learn more about Dr. Christie's research interests. Dr. Christie is highly rated in 20 conditions, according to our data. His top areas of expertise are Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), Mesothelioma, Endoscopy, and Thymectomy.

Percival Buenaventura is a Thoracic Surgeon and a General Surgeon in Winchester, Virginia. Dr. Buenaventura is highly rated in 17 conditions, according to our data. His top areas of expertise are Pleuropulmonary Blastoma, Hiatal Hernia, ALK-Positive Non-Small Cell Lung Cancer, Endoscopy, and Gastrostomy. Dr. Buenaventura is currently accepting new patients.