Recent landmark studies including the JCOG0802/WJOG4607L and CALGB 140503 trials have transformed the surgical management of small, early-stage lung cancers. These studies demonstrated that carefully selected patients with peripheral lung cancers measuring 2 cm or less can achieve survival outcomes comparable to traditional lobectomy while preserving more healthy lung tissue through segmentectomy. Some analyses have even shown improved overall survival with segmentectomy in selected populations, although local recurrence rates may be slightly higher, emphasizing the importance of patient selection and surgical expertise. VATS Segmentectomy Surgery is a highly specialised procedure done at a few centres.
Understanding Lung Anatomy and Lung Segments
To understand a segmentectomy, it helps to visualize the lung not as a single balloon but as a carefully organized city divided into neighborhoods. Each lung is divided into lobes, and each lobe is further divided into smaller anatomical units called bronchopulmonary segments. These segments have their own airway, blood supply, and lymphatic drainage. Because they function relatively independently, surgeons can remove one segment while preserving the remaining healthy lung tissue.
The right lung typically contains ten segments, while the left lung contains eight to ten segments depending on the anatomical classification. This segmented design is what makes a segmentectomy possible. Instead of removing an entire lobe, a surgeon can precisely remove only the diseased segment while leaving the rest of the lung intact. This concept has become increasingly important in the era of lung cancer screening, where cancers are being detected at much earlier stages.
For many patients, preserving lung tissue is not simply a technical preference—it can significantly affect long-term breathing capacity, exercise tolerance, and quality of life. As thoracic surgery evolves toward precision medicine, segmentectomy represents one of the most important advances in lung-preserving surgery.
What Is a Segmentectomy?
A segmentectomy is an anatomical lung resection in which one or more bronchopulmonary segments are removed while preserving the remaining portions of the lobe. Unlike wedge resection, which removes a non-anatomical piece of lung tissue, segmentectomy follows natural anatomical boundaries and includes systematic removal of associated blood vessels, bronchi, and lymphatic pathways.
The procedure has become increasingly popular for treating small, peripheral lung cancers, particularly those measuring 2 cm or less. Recent international studies have demonstrated that segmentectomy can provide excellent cancer control while preserving more healthy lung tissue than a lobectomy in appropriately selected patients.
Segmentectomy vs Wedge Resection
Many patients confuse segmentectomy with wedge resection. While both remove less lung tissue than a lobectomy, they are fundamentally different operations. A wedge resection removes a small piece of lung without respecting anatomical segmental boundaries. Segmentectomy, on the other hand, is a formal anatomical operation involving division of segmental arteries, veins, bronchi, and lymph nodes.
Studies consistently show superior oncological outcomes with segmentectomy compared to wedge resection for early-stage lung cancer.
Segmentectomy vs Lobectomy
Lobectomy has traditionally been considered the gold standard for early-stage lung cancer. However, emerging evidence suggests that for carefully selected tumors, segmentectomy can achieve comparable survival outcomes while preserving more lung function. The choice between the two procedures depends on tumor size, location, radiological appearance, pathology, and patient factors.
| Feature | Segmentectomy | Lobectomy |
| Lung tissue removed | One segment | Entire lobe |
| Lung preservation | Higher | Lower |
| Technical complexity | Higher | Moderate |
| Suitable for small tumors | Excellent | Excellent |
| Postoperative lung function | Better preserved | More reduction |
| Cancer control | Comparable in selected patients | Established standard |
What Does VATS Mean?
Video-Assisted Thoracoscopic Surgery (VATS) is a minimally invasive surgical technique that allows surgeons to operate inside the chest using small incisions and a high-definition camera. Instead of spreading the ribs through a large thoracotomy incision, VATS uses specialized instruments inserted through tiny ports.
Think of it as the difference between repairing a watch through a magnifying lens versus opening the entire watch casing. The surgeon gains excellent visualization while minimizing trauma to muscles, nerves, and ribs.
How VATS Changed Thoracic Surgery
Over the past two decades, VATS has revolutionized thoracic surgery worldwide. Patients experience less pain, reduced blood loss, shorter hospital stays, quicker recovery, and earlier return to normal activities. For lung cancer surgery, VATS has become the preferred approach in many leading international centers.
Today, most segmentectomies performed by experienced thoracic surgeons are completed using VATS techniques, providing the benefits of both precision surgery and minimally invasive access.
Who Is a Candidate for VATS Segmentectomy Surgery ?
Not every patient with lung cancer is suitable for segmentectomy. Proper patient selection is critical.
Early-Stage Lung Cancer
The ideal candidate is someone with a small peripheral non-small cell lung cancer, usually measuring 2 cm or less, without evidence of lymph node involvement. These tumors are often discovered incidentally or through low-dose CT screening programs.
Lung Nodules and Metastatic Tumors
Segmentectomy is also used for selected metastatic lung tumors, suspicious pulmonary nodules, second primary lung cancers, and certain benign conditions. In patients with limited lung reserve, preserving healthy lung tissue becomes even more important.
Candidates generally undergo detailed CT scanning, PET-CT, pulmonary function testing, and sometimes bronchoscopy before surgery.
Conditions Treated with VATS Segmentectomy Surgery
VATS segmentectomy can be used for several conditions, including:
- Early-stage non-small cell lung cancer
- Ground-glass opacities
- Suspicious pulmonary nodules
- Metastatic lung tumors
- Selected carcinoid tumors
- Benign lung lesions
- Certain congenital lung abnormalities
The exact indication depends on tumor biology, size, location, and overall patient health.
Preoperative Evaluation Before Surgery
Successful surgery begins long before entering the operating room. Every patient requires a comprehensive evaluation to determine whether segmentectomy is appropriate.
This typically includes a contrast-enhanced CT scan, PET-CT scan, pulmonary function tests, cardiac assessment, and laboratory investigations. Three-dimensional CT reconstructions are increasingly being used to map the segmental anatomy and identify anatomical variations before surgery.
The planning process resembles creating a detailed roadmap before a complex journey. Understanding the exact relationship between the tumor, blood vessels, and airways allows surgeons to maximize safety while ensuring adequate cancer clearance.
At specialized centers, these cases are often discussed in multidisciplinary tumor boards involving thoracic surgeons, pulmonologists, radiologists, pathologists, and oncologists.
How VATS Segmentectomy Surgery Is Performed
Under general anesthesia, the surgeon creates two to four small incisions on the side of the chest. A thoracoscope equipped with a high-definition camera provides magnified visualization of the lung structures.
Surgical Planning
The surgeon identifies the segmental artery, vein, and bronchus supplying the diseased segment. These structures are carefully divided while preserving the adjacent healthy segments.
The segmental plane is then delineated and divided using advanced stapling devices. The specimen is removed through one of the small incisions without the need for a large thoracotomy.
Lymph Node Assessment
An essential component of cancer surgery is lymph node evaluation. Systematic hilar and mediastinal lymph node sampling or dissection is performed to ensure accurate staging and optimize long-term outcomes.
This step is one of the major reasons segmentectomy differs from limited non-anatomical resections.
Benefits of VATS Segmentectomy
The greatest advantage of VATS segmentectomy is the combination of cancer treatment and lung preservation.
Patients benefit from:
- Preservation of healthy lung tissue
- Better postoperative lung function
- Smaller incisions
- Less postoperative pain
- Reduced blood loss
- Shorter hospitalization
- Faster recovery
- Earlier return to work and daily activities
- Excellent cosmetic results
For patients with existing lung disease such as COPD, preserving lung tissue can have substantial long-term benefits.
Potential Risks and Complications
Like any major surgery, VATS segmentectomy carries risks.
Potential complications include:
- Air leak
- Bleeding
- Pneumonia
- Atrial fibrillation
- Respiratory failure
- Wound infection
- Persistent pleural drainage
- Rare need for conversion to thoracotomy
Fortunately, in experienced centers, complication rates remain low and most patients recover uneventfully.
The key factor is not merely the procedure itself but the expertise of the surgical team performing it.
Recovery After VATS Segmentectomy
Most patients are surprised by how quickly recovery occurs after minimally invasive surgery. Patients typically begin walking on the day of surgery or the following morning. Chest drains are removed once the lung has fully expanded and air leakage has resolved.
Hospital stay commonly ranges from three to five days, although some patients may be discharged earlier depending on recovery.
During the first few weeks, mild discomfort, fatigue, and reduced exercise tolerance are expected. Regular walking, breathing exercises, and physiotherapy accelerate recovery. Most patients resume normal daily activities within a few weeks and return to work within four to six weeks.
The recovery experience is often dramatically different from traditional open thoracic surgery performed decades ago.
Long-Term Outcomes and Cancer Control
Long-term outcomes depend on patient selection and surgical quality. Recent landmark trials have shown that segmentectomy can provide survival outcomes comparable to lobectomy for selected small peripheral lung cancers. Some studies have demonstrated superior overall survival, although careful interpretation is required due to slightly higher local recurrence rates observed in certain populations.
The most important determinants of success include:
- Complete tumor removal
- Adequate surgical margins
- Thorough lymph node evaluation
- Appropriate patient selection
- Multidisciplinary care
When these principles are followed, segmentectomy has become a powerful tool in modern thoracic oncology.
Why Surgical Expertise Matters
Segmentectomy is often more technically demanding than lobectomy. The surgeon must navigate complex anatomical variations while ensuring complete cancer removal and preservation of healthy lung tissue.
This is why experience matters enormously. Advanced procedures such as S10 segmentectomy, posterior segmentectomy, superior segmentectomy, lingulectomy, and combined segmentectomies require detailed anatomical knowledge and significant thoracoscopic expertise.
Patients should seek surgeons who perform these operations regularly and who are comfortable with complex minimally invasive lung resections.
VATS Segmentectomy in India
India has witnessed remarkable advances in thoracic surgery over the past decade. High-definition imaging, advanced stapling technologies, minimally invasive techniques, and multidisciplinary cancer programs have made VATS segmentectomy increasingly available in major centers.
Patients from across India and internationally now travel to specialized thoracic surgery centers for lung-preserving procedures that were previously unavailable or rarely performed.
The growing adoption of low-dose CT screening and improved awareness of lung cancer are likely to further increase the role of segmentectomy in the coming years.
Why Choose Dr. Kamran Ali for VATS Segmentectomy in Delhi
For patients seeking VATS Segmentectomy Surgery in Delhi, Dr. Kamran Ali is among the few thoracic surgeons in India with extensive experience in advanced minimally invasive lung surgery.
As Associate Director of Thoracic Surgery at Max Super Speciality Hospital, Dr. Kamran Ali specializes in lung cancer surgery, VATS lobectomy, complex segmentectomy, robotic thoracic surgery, and lung transplantation. His practice focuses exclusively on thoracic diseases, ensuring that patients receive highly specialized care.
Dr. Ali has performed advanced anatomical segmentectomies including complex procedures such as S10 segmentectomy, S1 Segmentectomy and lung-preserving resections for early-stage lung cancer. His approach emphasizes precision surgery, oncological safety, and preservation of lung function whenever appropriate.
Patients from India, Bangladesh, Central Asia, Africa, and the Middle East frequently seek his expertise for complex thoracic surgical conditions.
Conclusion
VATS segmentectomy represents one of the most significant advances in modern thoracic surgery. By combining the principles of minimally invasive surgery with lung preservation, it offers carefully selected patients an opportunity to achieve excellent cancer control while maintaining more healthy lung tissue.
As evidence continues to evolve, segmentectomy is becoming an increasingly important option for small, early-stage lung cancers. Success depends on careful patient selection, meticulous surgical technique, and comprehensive multidisciplinary care.
For patients diagnosed with a small lung cancer or suspicious pulmonary nodule, discussing the possibility of VATS segmentectomy with an experienced thoracic surgeon can help determine whether this lung-preserving approach is the right choice.
Frequently Asked Questions
1. Is VATS segmentectomy better than lobectomy?
Not necessarily. For selected small peripheral lung cancers, segmentectomy can provide outcomes comparable to lobectomy while preserving more lung tissue. The best procedure depends on the tumor and patient characteristics.
2. How long does VATS segmentectomy take?
Most procedures take between 2 and 4 hours, depending on complexity and anatomical variations.
3. Is VATS segmentectomy painful?
Patients generally experience significantly less pain compared with traditional open thoracic surgery because only small incisions are used.
4. How long is the hospital stay?
Most patients stay in the hospital for approximately 3–5 days after surgery.
5. Can lung cancer come back after segmentectomy?
Yes, recurrence is possible after any cancer surgery. Proper patient selection, adequate margins, and lymph node assessment help minimize this risk.
References
- Suzuki K, Saji H, Aokage K, et al. Segmentectomy versus lobectomy in small-sized peripheral non-small-cell lung cancer (JCOG0802/WJOG4607L). Lancet. 2022;399(10335):1607-1617. Available at: https://pubmed.ncbi.nlm.nih.gov/35461558/
- Altorki NK, Wang X, Wigle D, et al. Lobar or Sublobar Resection for Peripheral Stage IA Non-Small-Cell Lung Cancer. N Engl J Med. 2023. Available at: https://www.nejm.org/doi/full/10.1056/NEJMoa2212083
- Rusch VW. Initiating the Era of Precision Lung Cancer Surgery. N Engl J Med. 2023. Available at: https://www.nejm.org/doi/full/10.1056/NEJMe2215647
- Li T, et al. Survival outcomes of segmentectomy and lobectomy for early-stage non-small cell lung cancer. J Cardiothorac Surg. 2024. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11193294/
- Altorki NK, et al. Lobectomy, segmentectomy, or wedge resection for peripheral clinical T1aN0 non-small cell lung cancer: A post hoc analysis of CALGB 140503. J Thorac Cardiovasc Surg. 2024. Available at: https://doi.org/10.1016/j.jtcvs.2023.07.008
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