A wedge resection is a surgery that removes a small, triangle-shaped piece of tissue, most commonly from the lung. It takes out a tumor along with a thin margin of healthy tissue surrounding it, while leaving the rest of the lung lobe intact. It’s the most conservative type of lung surgery for removing cancerous or suspicious growths, and it’s typically reserved for tumors no larger than 2 centimeters.
How a Wedge Resection Works
Unlike more extensive lung surgeries, a wedge resection is a non-anatomical procedure. That means the surgeon doesn’t follow the lung’s natural structural divisions. Instead, they cut directly around the tumor and a buffer of normal tissue, removing a wedge-shaped slice. The remaining lung tissue stays in place and continues to function.
Most wedge resections are now performed using video-assisted thoracoscopic surgery (VATS) rather than traditional open surgery. In a VATS approach, the surgeon works through one or two small incisions, typically 4 to 5 centimeters, placed between the ribs. A small camera guides the procedure. This minimally invasive technique causes less pain and allows faster recovery compared to a full thoracotomy, which requires a larger incision along the back and side of the chest.
When Surgeons Recommend It
Wedge resection is most commonly used for early-stage non-small cell lung cancer, particularly when the tumor is 2 centimeters or smaller and hasn’t spread to lymph nodes. It’s an especially strong option when imaging shows the tumor has a significant “ground glass” appearance, meaning the nodule is partly hazy rather than fully solid on a CT scan. Tumors where less than half the volume appears solid tend to have excellent outcomes with wedge resection alone.
Beyond treating confirmed cancers, surgeons frequently use wedge resection to biopsy suspicious lung nodules. When a spot on imaging can’t be definitively diagnosed any other way, removing a wedge of tissue provides enough material for a pathologist to determine whether cancer is present. This diagnostic role makes wedge resection one of the most commonly performed lung procedures overall.
Older patients and people with limited lung function often benefit most from this approach. Because it removes so little tissue, it’s a viable option for patients who couldn’t tolerate the loss of an entire lobe.
Wedge Resection vs. Segmentectomy vs. Lobectomy
These three procedures represent a spectrum from least to most tissue removed:
- Wedge resection removes only the tumor and a small margin around it, without following anatomical boundaries. It preserves the most lung tissue.
- Segmentectomy removes an entire anatomical segment of a lobe (each lobe contains several segments). It takes more tissue but also removes the lymph nodes draining that segment, which provides more information about whether cancer has spread.
- Lobectomy removes an entire lobe of the lung. It has long been considered the standard of care for early-stage lung cancer because it offers the widest margins and the most thorough lymph node sampling.
Lobectomy remains the benchmark for long-term cancer control. Five-year overall survival is about 87% for lobectomy compared to roughly 82% for wedge resection in early-stage disease. The bigger gap shows up in recurrence: five-year recurrence-free survival runs around 29% for lobectomy versus about 18% for wedge resection, meaning cancer is more likely to come back locally after a wedge procedure. That trade-off is why careful patient selection matters so much.
Impact on Lung Function
One of the primary advantages of wedge resection is how little lung capacity you lose. Studies measuring breathing function more than six months after surgery show that patients typically lose only 3% to 4% of their air-moving capacity, with a slightly larger 4% to 12% drop in the lung’s ability to transfer oxygen into the bloodstream. For most people, this is a barely noticeable change in daily life. By comparison, losing an entire lobe produces a significantly larger and more permanent reduction in lung function.
Risks and Complications
Wedge resection carries the lowest complication rate among lung cancer surgeries. The most common issue is a prolonged air leak, where air continues escaping from the cut surface of the lung longer than expected. This happens in about 3.5% of wedge resections, compared to roughly 6.7% after segmentectomy and 8.6% after lobectomy. Other possible complications include bleeding, infection, and pneumonia, though these occur less frequently with wedge resection than with more extensive procedures.
A chest tube is placed during surgery to drain fluid and air from the space around the lung. It’s typically removed once the lung has fully re-expanded, there’s no ongoing air leak, and the drainage looks clear. For many patients this happens within the first day after surgery. In some cases, patients go home with a portable drainage system attached and return to have the tube removed once the air leak resolves.
Recovery and Hospital Stay
Hospital stays after wedge resection average about 3 days, which is notably shorter than the roughly 5 days typical for anatomical resections like lobectomy or segmentectomy. Some patients in accelerated recovery programs are discharged even sooner.
Pain management after a VATS wedge resection is generally more manageable than after open surgery, since the incisions are smaller and no ribs are spread apart. Most people can expect to return to light daily activities within one to two weeks, with a gradual return to more demanding physical activity over the following weeks. Your surgical team will guide the timeline based on how your incision sites are healing and whether any complications arose.
Who Is a Good Candidate
The best candidates for curative-intent wedge resection have a single lung nodule no larger than 2 centimeters, with no evidence of lymph node involvement. Tumors that appear mostly ground glass on CT imaging, where the solid portion makes up 50% or less of the total, are particularly well suited. For very faint nodules where solid components are 25% or less, wedge resection produces outcomes comparable to more aggressive surgery.
Patients with reduced lung capacity, other serious health conditions, or advanced age may be offered wedge resection even when a lobectomy might otherwise be preferred, because the smaller procedure is easier on the body. For these patients, preserving lung tissue can be more important than the modest statistical improvement in recurrence rates that lobectomy provides. The margin of healthy tissue around the tumor needs to be carefully evaluated to minimize the chance of leaving microscopic cancer cells behind.