SUMMARY: The American Cancer Society estimates that for 2025, about 226,650 new cases of lung cancer will be diagnosed and 124,730 patients will die of the disease. Lung cancer is the leading cause of cancer-related mortality in the United States. Non-Small Cell Lung Cancer (NSCLC) accounts for approximately 85% of all lung cancers and Adenocarcinoma now is the most frequent histologic subtype of lung cancer.
For patients with early-stage resectable NSCLC, surgery remains the cornerstone of treatment. The primary surgical options are lobectomy which involves the removal of an entire lobe of the lung and is commonly recommended for early-stage disease. In contrast, pneumonectomy involves the removal of an entire lung and is rarely performed due to its high mortality rate. An alternative to lobectomy is sublobar resection, which includes wedge resection and segmentectomy. These procedures are often considered when a patient is deemed high-risk or when the tumor is particularly small. Sublobar resections are viewed as “compromise operations” in patients who might not tolerate a more extensive lobectomy. Wedge resection removes the tumor along with a margin of healthy tissue but does not follow the natural anatomical structure of the lung. Segmentectomy, unlike wedge resection, is considered an anatomical resection. This means it involves removing a whole lung segment (one of the distinct anatomical divisions of the lung), along with any potentially involved lymph nodes in the hilum and mediastinum. Segmentectomy is more extensive than wedge resection but less so than lobectomy. Implementation of lung cancer screening programs for high-risk individuals have led to an increase in the detection of small tumors, which has, in turn, resulted in an uptick in sublobar resections, even among patients with low surgical risks.
The Society of Thoracic Surgeons (STS) General Thoracic Surgery Database (GTSD) is a comprehensive national database that captures extensive data on lung cancer and esophageal cancer surgeries performed across the United States. This invaluable resource provides a benchmark for assessing patient characteristics, surgical procedures and outcomes, making it a crucial tool for guiding clinical practice and patient care. The study in question leverages the Real-World Data from this database to provide new insights into the long-term survival outcomes of various surgical approaches for patients with early-stage NSCLC, specifically Stage IA tumors (2 cm or less).
This study presented at the 2025 Society of Thoracic Surgeons Annual Meeting included 32,340 patients who underwent surgery for Stage IA NSCLC. The following was the breakdown-Lobectomy (N=19,778), Wedge resection (N=8,283) and Segmentectomy (N=4,279). The study sought to evaluate long-term survival, with a focus on 10-year Overall Survival (OS) and 7-year Lung Cancer-Specific Survival (LCSS). By analyzing these outcomes, the researchers aimed to determine which surgical approach provided the best prognosis for these patients.
Lobectomy as expected emerged as the procedure with the highest long-term survival rates, with a 5-year OS rate of 71.9% and a 10-year OS rate of 44.8%. Segmentectomy which is a more extensive procedure than Wedge resection but less so than Lobectomy, showed promising results. The 5-year OS was 69.6%, and the 10-year OS was 44.2%. Wedge resection which is less anatomically precise and typically used in higher-risk patients, had lower survival outcomes, with a 5-year OS of 66.3% and a 10-year OS of 41.4%. Lobectomy was associated with the best overall and cancer-specific survival rates when compared to Wedge resection, while Segmentectomy also demonstrated favorable survival outcomes, though not as robust as Lobectomy.
One of the significant contributions of this study is its ability to highlight the value of Real-World Data in understanding patient outcomes, particularly in situations where randomized controlled trials may fall short. This study emphasizes that in real-world clinical practice, surgeons are often using Sublobar resections as a compromise for patients who may not be candidates for a Lobectomy. These findings are crucial for clinicians in making informed decisions that take into account both the immediate risks and the long-term survival prospects for patients.
The researchers concluded that this study is a significant step forward in understanding the long-term survival outcomes of surgical options for patients with Stage IA NSCLC. The authors added that this study highlights the critical role of surgery in the comprehensive care of lung cancer patients by providing vital nodal staging, in addition to providing tumor tissue to be sequenced for precision medicine, an important aspect of personalized cancer care. Further, surgery is proven to be exceptionally safe, with a low incidence of post-operative complications. This study sets a new standard in the way we approach lung cancer surgery, offering a comprehensive view of the risks and benefits of different surgical approaches for early-stage disease.
Anatomic Lung Resection Linked to Improved Survival for Early-Stage Lung Cancer. Presented at the 2025 Society of Thoracic Surgeons (STS) Annual Meeting. January 25, 2025. https://www.sts.org/press-releases/anatomic-lung-resection-linked-improved-survival-early-stage-lung-cancer.
