A thoracic surgeon is a specialist who operates on organs and structures inside the chest cavity, excluding the heart in most cases. While cardiothoracic surgeons handle both heart and chest operations, many thoracic surgeons focus specifically on the lungs, esophagus (food pipe), trachea (windpipe), diaphragm, chest wall, and the mediastinum, which is the space between the lungs where lymph nodes and other tissues sit. These surgeons complete some of the longest training paths in medicine, typically 10 to 13 years after college, and treat everything from lung cancer to structural problems with the ribcage.
What a Thoracic Surgeon Operates On
The word “thoracic” refers to the thorax, the medical term for your chest. A thoracic surgeon’s territory covers the lungs, the esophagus running behind them, the trachea above, the diaphragm below, and the chest wall itself, meaning the ribs, breastbone, and surrounding muscles. Some thoracic surgeons also operate on the heart and are called cardiothoracic surgeons, but the specialty increasingly distinguishes between heart-focused and non-heart-focused surgeons.
This is a different scope than what a pulmonologist or gastroenterologist handles. Those doctors diagnose and manage diseases with medication or nonsurgical procedures. When a condition in the chest requires an operation, the thoracic surgeon steps in.
Conditions They Treat
Lung cancer is the condition most closely associated with thoracic surgery, but the full list is far broader. Mayo Clinic’s thoracic surgery department lists nearly 40 conditions, spanning cancers, structural abnormalities, and chronic diseases.
On the cancer side, thoracic surgeons operate on lung cancer, esophageal cancer, stomach cancer, mesothelioma (a cancer linked to asbestos exposure), chest wall tumors, thymic tumors, and mediastinal tumors. They also evaluate and sometimes remove lung nodules or masses that might be cancerous.
Beyond cancer, thoracic surgeons treat a wide range of conditions:
- Lung diseases: emphysema, COPD, pulmonary fibrosis, interstitial lung disease, cystic fibrosis, and collapsed lung (pneumothorax)
- Esophageal problems: Barrett’s esophagus, achalasia (where the lower esophagus won’t relax to let food pass), strictures that narrow the food pipe, severe GERD, and hiatal hernias
- Chest wall issues: pectus excavatum (sunken chest) and pectus carinatum (protruding chest), both structural deformities that can compress the lungs or heart
- Other conditions: pleural effusion (fluid around the lungs), thoracic outlet syndrome (compressed nerves or blood vessels near the collarbone), tracheal stenosis (narrowing of the windpipe), hyperhidrosis (excessive sweating treatable by cutting certain nerves in the chest), and myasthenia gravis (an autoimmune condition sometimes improved by removing the thymus gland)
Common Procedures
The specific operations thoracic surgeons perform range from small diagnostic procedures to major, multi-hour surgeries. A lung biopsy, where a small tissue sample is taken to check for cancer or infection, sits on the simpler end. A lobectomy, which removes an entire lobe of the lung (you have three on the right, two on the left), is one of the most common operations for early-stage lung cancer. For more advanced disease, a pneumonectomy removes an entire lung.
On the esophageal side, an esophagectomy removes part or all of the food pipe and reconstructs it, typically using a portion of the stomach. This is a complex surgery often required for esophageal cancer. Lung volume reduction surgery, where damaged portions of the lung are removed to let healthier tissue expand better, is used for severe emphysema. Chest wall resections remove tumors or damaged bone and muscle from the ribcage area, sometimes requiring reconstruction with synthetic materials.
Open Surgery vs. Minimally Invasive Approaches
Traditionally, thoracic surgery required a thoracotomy: a large incision between the ribs that spreads them apart to give the surgeon direct access. This approach is still used for complex cases, but most major procedures that once required open surgery can now be done through much smaller incisions.
Video-assisted thoracoscopic surgery (VATS) uses a small camera called a thoracoscope, inserted between the ribs along with thin surgical instruments through one or several small cuts. The surgeon watches a video screen and operates with instruments that reach into the chest while their hands stay outside the body. Recovery is faster, pain is reduced, and hospital stays are shorter compared to open surgery.
Robotic-assisted thoracic surgery (RATS) takes this a step further. The surgeon sits at a separate console and controls robotic arms that hold the instruments. The key difference from VATS is that the surgeon never directly handles the tools. Instead, they manipulate controls that translate their hand movements into precise motions at the tips of the robotic instruments inside the chest. This allows for greater range of motion in tight spaces and can be especially useful in delicate dissections around blood vessels or nerves. Both VATS and RATS follow the same fundamental surgical principles as open surgery, just with smaller access points.
Training and Certification
Becoming a thoracic surgeon requires one of the longest training pipelines in medicine. After four years of medical school, there are three main pathways recognized by the Thoracic Surgery Directors Association.
The traditional pathway involves five years of general surgery residency followed by two to three years of cardiothoracic surgery residency, totaling 11 to 12 years of training after college. The integrated pathway, sometimes called I-6, is a six-year residency focused entirely on cardiothoracic surgery from the start, cutting the overall timeline to about 10 years post-college. A third option, the joint track, combines four years of general surgery with three years of cardiothoracic surgery at a single institution.
After completing any of these pathways, surgeons are eligible to sit for certification by the American Board of Thoracic Surgery (ABTS). Those who trained through the traditional or joint pathways can also seek certification from the American Board of Surgery. The ABTS requires candidates to hold a full, unrestricted medical license and pass the board’s examinations. Starting in 2022, the ABTS also introduced an alternate pathway for exceptional international medical graduates. Some surgeons pursue additional fellowship training in subspecialties like thoracic aortic surgery, congenital heart surgery, or heart failure and transplantation.
How Thoracic Surgeons Differ From Related Specialists
The overlap between thoracic surgeons and nearby specialties can be confusing. A pulmonologist manages lung diseases medically and performs bronchoscopies (camera exams of the airways), but doesn’t operate. A cardiothoracic surgeon handles both heart and chest operations, while a general thoracic surgeon focuses on everything in the chest except the heart. A surgical oncologist might remove tumors elsewhere in the body but typically refers chest tumors to a thoracic surgeon because of the specialized anatomy involved.
If you’re referred to a thoracic surgeon, it usually means your condition has reached a point where surgery is being considered as a treatment option, or a tissue sample is needed that can’t be obtained through less invasive methods. Your referring doctor, whether a pulmonologist, oncologist, or gastroenterologist, will typically have already completed the diagnostic workup before the thoracic surgeon evaluates you for an operation.