# Long-term outcomes and risk factors for recurrence after lung segmentectomy

## TL;DR

This study examines long-term outcomes and recurrence risk factors after lung segmentectomy for early-stage lung cancer.

## Contribution

The study identifies pure solid tumor appearance as a significant risk factor for recurrence and decreased survival after lung segmentectomy.

## Key findings

- The 5-year and 10-year recurrence-free survival rates were 89.7% and 79.8%, respectively.
- Pure solid tumors were strongly associated with recurrence (hazard ratio 23.151).
- Patients with higher preoperative PET/CT maximum standardized uptake value had a higher recurrence rate.

## Abstract

The long-term oncological outcomes and risk factors for recurrence after lung segmentectomy are unclear. The aims of this study were to investigate the long-term prognosis and to evaluate risk factors for recurrence after segmentectomy.

Between January 2008 and December 2012, a total of 177 patients underwent segmentectomy for clinical stage I non-small cell lung cancer. The median follow-up period was 120.1 months. The overall survival (OS) and recurrence-free survival curves were analysed using the Kaplan–Meier method with a log-rank test. Univariable and multivariable analyses were used to identify significant factors that predicted recurrence.

The study included 177 patients with a median age of 67 years. The median operative time was 155 min. No 30-day deaths were observed. Nine patients (5.1%) had recurrences: loco-regional in 3, distant in 3 and both in 3. The 5-year and 10-year recurrence-free survival rates were 89.7% and 79.8%, and the OS rates were 90.9% and 80.4%, respectively. On multivariable analysis, the risk factor associated with recurrence was a pure solid tumour [hazard ratio, 23.151; 95% confidence interval 2.575–208.178; P = 0.005]. The non-pure solid tumour group had a significantly better probability of survival (5-year OS: 95.4% vs 77.2%; 10-year OS: 86.5% vs 61.8%; P < 0.0001). A total of 113 patients received preoperative positron emission tomography/computed tomography. Patients with a higher maximum standardized uptake value had a significantly higher recurrence rate.

Segmentectomy for clinical stage I non-small cell lung cancer produced acceptable long-term outcomes. Pure solid radiographic appearance was associated with recurrence and decreased survival.

Computed tomography (CT) screening, including thin-section CT, has recently been used to detect small lung cancers.