Lobectomy Demonstrates Superior Survival Than Segmentectomy for High-Grade Non-Small Cell Lung Cancer: The National Cancer Database Analysis.

BACKGROUND

Current recommendations for segmentectomy for non-small cell lung cancer (NSCLC) include size ≤2 cm, margins ≥ 2 cm, and no nodal involvement. This study further stratifies the selection criteria for segmentectomy using the National Cancer Database (NCDB).

METHODS

The NCDB was queried for patients with high-grade (poorly/undifferentiated) T1a/b peripheral NSCLC (tumor size ≤2 cm), who underwent either lobectomy or segmentectomy. Patients with pathologic node-positive disease or who received neoadjuvant/adjuvant treatments were excluded. Propensity score analysis was used to adjust for differences in pretreatment characteristics.

RESULTS

11 091 patients were included with 10 413 patients (93.9%) treated with lobectomy and 678 patients (6.1%) underwent segmentectomy. In a propensity matched pair analysis of 1282 patients, lobectomy showed significantly improved median survival of 88.48 months vs 68.30 months for segmentectomy, = .004. On multivariate Cox regression, lobectomy was associated with significantly improved survival (hazard ratio (HR): .81, 95% CI .72-.92, = .001). Subgroup analysis of propensity score matched patients with a Charlson-Deyo comorbidity score (CDCC) of 0 also demonstrated a trend of improved survival with lobectomy.

DISCUSSION

Lobectomy may confer significant survival advantage over segmentectomy for high-grade NSCLC (≤2 cm). More work is needed to further stratify various NSCLC histologies with their respective grades allowing more comprehensive selection criteria for segmentectomy.