Lobectomy versus Sublobar Resection in Non-Lepidic Small-Sized Non-Small Cell Lung Cancer

Sublobar resection versus ablation for stage I non-small-cell lung cancer: a meta-analysis

Background

Stage I non-small-cell lung cancer (NSCLC) can be treated by both ablation and sublobar resection (SR). This meta-analysis was therefore designed to better compare the relative safety and efficacy of these two approaches to treating stage I NSCLC.

Materials and methods

Relevant studies published through November 2020 in the Cochrane Library, Embase, and PubMed databases were identified for analyses which were conducted with RevMan v5.3.

Results

In total, 816 potentially relevant articles were identified, of which 8 were ultimately included in the final meta-analysis. Patients in the SR group exhibited a signficantly lower pooled local recurrence (LR) rate (5.0% vs. 25.4%, P < 0.0001), although pooled distant recurrence (DR) rates were similar in both groups (25.7% vs. 23.1%, P = 0.75). The pooled hazard ratio (HR) for overall survival (OS) (HR: 1.23; 95% CI: 1.13–1.33, P < 0.00001), progression-free survival (PFS) (HR: 1.34; 95% CI: 1.15–1.55, P = 0.0002), and cancer-specific survival (HR: 1.39; 95% CI: 1.15–1.70, P = 0.0009) all indicated better survival outcomes among patients that underwent HR treatment, while pooled complication rates were similar in both groups (27.7% vs. 43.8%, P = 0.27). Patients that underwent ablation exhibited significantly shorter pooled post-operative hospitalization relative to those in the SR group (MD: 5.93; 95% CI: 0.78–11.07, P = 0.02). No evidence of publication bias was detected through funnel plot analyses.

Conclusions

SR treatment of stage I NSCLC patients was associated with a lower LR rate and longer survival as compared to ablation.

Application of radiography of computed tomography in non-small cell lung cancer using prognosis model

Objective

Studying the diagnostic value of CT imaging in non-small cell lung cancer (NSCLC), and establishing a prognosis model combined with clinical characteristics is the objective, so as to provide a reference for the survival prediction of NSCLC patients.

Method

CT scan data of NSCLC 200 patients were taken as the research object. Through image segmentation, the radiology features of CT images were extracted. The reliability and performance of the prognosis model based on the optimal feature number of specific algorithm and the prognosis model based on the global optimal feature number were compared.

Results

30-RELF-NB (30 optimal features, RELF feature selection algorithm and NB classifier) has the highest accuracy and AUC (area under the subject characteristic curve) in the prognosis model based on the optimal features of specific algorithm. Among the prognosis models based on global optimal features, 25-NB (25 global optimal features, naive Bayes classification algorithm classifier) has the highest accuracy and AUC. Compared with the prediction model based on feature training of specific feature selection algorithm, the overall performance and stability of the prediction model based on global optimal feature are higher.

Conclusion

The prognosis model based on the global optimal feature established in this paper has good reliability and performance, and can be applied to the CT radiology of NSCLC.

Do the surgical results in the National Lung Screening Trial reflect modern thoracic surgical practice?

INTRODUCTION

Surgical data from the National Lung Screening Trial (NLST) has yet to be closely examined. We sought to analyze surgical procedures and complications from the NLST to determine their relevance to modern surgical practice.

METHODS

The NLST database was queried for patients who underwent surgical resection for confirmed lung cancer, specifically evaluating postoperative complications. Numerical variables were compared using the Mann-Whitney U test. Categorical variables were compared using the χ² test. Logistic regression uni- and multivariable analysis of independent risk factors of postoperative complications was performed.

RESULTS

At operation, 80% of patients (n = 821) had lobectomy, 4.1% (n = 42) had pneumonectomy, and 16.1% (n = 166) had sublobar resection, among whom 69% (n = 114) had wedge resection. Only 29.6% (n = 305) of the cohort had a thoracoscopic resection. Although the overall rate of surgical patients with any complication was 31% (n = 318), only 15.5% of patients (n = 160) had major complications, most commonly prolonged air leaks (n = 67, 6.5%). Respiratory failure (n = 28, 2.7%), prolonged ventilation (n = 9, 0.9%), myocardial infarction or cardiac arrest (n = 7, 0.7%), and stroke (n = 2, 0.2%) were rare events. Overall 30-day mortality in patients undergoing resection was 1.7% (n = 18). On multivariable analysis, greater smoking pack history (odds ratio [OR], 1.01; 95% confidence interval [CI], 1.001-1.01) and pulmonary comorbidities (OR, 1.34; 95% CI, 0.98-1.82) were significant or approached significance for an association with complications/death, whereas sublobar resection (OR, 0.59; 95% CI, 0.38-0.94) and video-assisted thoracoscopic surgery approach (OR, 0.76; 95% CI, 0.56-1.04) were significant or approached significance for an association with decreased rates of complications/death.

CONCLUSIONS

Operative mortality and postoperative morbidity were very low in patients undergoing resection for screen-detected lung cancer. Increased use of sublobar resection and minimally invasive surgical approaches may be associated with fewer complications.

Surgical Outcomes of Radiographically Noninvasive Lung Adenocarcinoma according to Surgical Strategy: Wedge Resection, Segmentectomy, and Lobectomy

Background

The aim of this study was to evaluate the outcomes of surgical resection in patients with radiographically noninvasive lung adenocarcinoma according to the surgical strategy.

Methods

A retrospective study was conducted of 128 patients who underwent pulmonary resection for ground-glass opacity (GGO)–dominant nodules measuring ≤2 cm with a consolidation/tumor ratio ≤0.25 based on computed tomography between 2008 and 2015. The 5-year disease-free survival (DFS) rate and 5-year overall survival (OS) rate were analyzed.

Results

Among the 128 patients, wedge resection, segmentectomy, and lobectomy were performed in 40 (31.2%), 22 (17.2%), and 66 patients (51.6%), respectively. No significant differences were found among the groups in the mean size of tumors (p=0.119), the rate of pure-GGO nodules (p=0.814), the consolidation/tumor ratio (p=0.695), or the rate of invasive adenocarcinoma (p=0.378). Centrally located tumors were more common in the lobectomy group (21.2%) than in the wedge resection (0%) or segmentectomy (0%) groups (p=0.001). There were no significant differences in the 5-year DFS rate (100%, 100%, 92.7%, respectively; p=0.76) or 5-year OS rate (100%, 100%, 100%; p=0.223) among the wedge resection, segmentectomy, and lobectomy groups.

Conclusion

For radiographically noninvasive lung adenocarcinoma measuring ≤2 cm with a consolidation/tumor ratio ≤0.25, wedge resection and segmentectomy could be comparable surgical options to lobectomy.