The Outcomes of a Limited Resection for Non-Small Cell Lung Cancer Based on Differences in Pathology

Area of Science:

• Thoracic Surgery
• Surgical Oncology
• Pulmonary Medicine

Background:

• Precise preoperative diagnosis of in situ or minimally invasive lung carcinoma can guide treatment decisions towards limited resection.
• While clinical trials are ongoing, results from limited resection studies are crucial for refining surgical strategies.

Purpose of the Study:

• To perform a subclass analysis of limited resection outcomes based on pathological differences in non-small cell lung carcinoma.
• To evaluate the efficacy of limited resection (segmentectomy or wedge resection) in patients with cT1N0M0 non-small cell lung carcinoma.

Main Methods:

• Analysis of data from 1710 patients who underwent limited resection for cT1N0M0 non-small cell lung carcinoma.
• Exclusion of small cell carcinomas and carcinoid tumors; sub-classification of adenocarcinomas based on consolidation-to-tumor ratio (C/T) and tumor diameter.
• Assessment of disease-free survival (DFS) and recurrence-free proportion (RFP) at 5 years.

Main Results:

• Adenocarcinoma showed high 5-year DFS (92.2%) and RFP (94.7%).
• Squamous cell carcinoma (SqCC) had lower 5-year DFS (76.3%) and RFP (82.4%), with segmentectomy being a favorable prognostic factor.
• Other pathologies, particularly large cell carcinomas, exhibited worse prognoses (DFS and RFP: 46.3%).

Conclusions:

• Pathological diagnosis is critical for determining the suitability of limited resection.
• Tumor diameter and C/T ratio are valuable indicators for limited resection in adenocarcinoma.
• Limited resection is a viable option for adenocarcinoma, but requires caution for SqCC and other lung cancer types.