Comparison of segmentectomy and wedge resection for cT1cN0M0 non-small cell lung cancer.

OBJECTIVE:Sublobar resection is considered a standard surgical procedure for early non-small cell lung cancer, although the survival of patients undergoing sublobar resection for clinical T1cN0M0 non-small cell lung cancer remains unclear. This study aimed to compare survival between segmentectomy and wedge resection for clinical T1cN0M0 non-small cell lung cancer. METHODS:This retrospective study included patients who had undergone curative surgery for cT1cN0M0 stage IA3 non-small cell lung cancer. The overall and recurrence-free survival rates of 91 patients who underwent segmentectomy or wedge resection were compared. RESULTS:Thirty-nine (42.9%) and 52 patients (57.1%) were included in the segmentectomy and wedge resection groups, respectively. The median length of follow-up was 6.0 years (95% confidence interval 4.2 - - years) (Kaplan-Meier estimate). The 5 year overall survival rates were not significantly different between the segmentectomy and wedge resection groups (67.7% vs 52.0%, P = 0.132). The 5 year recurrence-free survival rate was worse in the wedge resection group than in the segmentectomy group (66.6% vs 46.9%, P = 0.047). In univariable analysis, spread through air spaces (hazard ratio, 5.889; 95% confidence interval, 2.357-14.715; P < 0.001) was an important prognostic factor for recurrence-free survival in the wedge resection group. CONCLUSIONS:The overall survival of patients who underwent segmentectomy for clinical T1cN0M0 non-small cell lung cancer was not significantly different from that of patients who underwent wedge resection. However, patients with cT1cN0M0 non-small cell lung cancer who underwent wedge resection tended to have a worse recurrence-free survival prognosis than those who underwent segmentectomy.