Minimally invasive open surgery (MIOS) for clinical stage I lung cancer: diversity in minimally invasive procedures

Analysis of Influencing Factors and Construction of Predictive Model for Persistent Cough After Lung Cancer Resection Under Thoracoscopy

Objective

This study aims to explore the influencing factors of cough after pulmonary resection (CAP) after thoracoscopic lung resection in lung cancer patients and to develop a predictive model.

Methods

A total of 374 lung cancer patients who underwent lung resection in our hospital from March 2020 to October 2023 were randomly divided into a modeling group (n=262) and a validation group (n=112). Based on the occurrence of CAP in the modeling group, the patients were divided into a CAP group (n=85) and a non-CAP group (n=177). Multivariate Logistic regression analysis was used to identify the influencing factors of CAP in lung cancer patients. A nomogram model for predicting the risk of CAP was constructed using R4.3.1. The consistency of the model's predictions was evaluated, and a clinical decision curve (DCA) was drawn to assess the clinical utility of the nomogram. The predictive performance of the model was evaluated using ROC curves and the Hosmer-Lemeshow test.

Results

Multivariate Logistic regression analysis showed that smoking history (OR=6.285, 95% CI: 3.031-13.036), preoperative respiratory function training (OR=20.293, 95% CI: 7.518-54.779), surgical scope (OR=20.667, 95% CI: 7.734-55.228), and peribronchial lymph node dissection (OR=5.883, 95% CI: 2.829-12.235) were significant influencing factors of CAP in lung cancer patients (P<0.05). ROC curves indicated good discriminatory power of the model, and the Hosmer-Lemeshow test showed a high degree of agreement between predicted and actual probabilities. The DCA curve revealed that the nomogram model had high clinical value when the high-risk threshold was between 0.08 and 0.98.

Conclusion

The nomogram model based on smoking history, preoperative respiratory function training, surgical scope, and peribronchial lymph node dissection has high predictive performance for CAP in lung cancer patients. It is useful for clinical prediction, guiding preoperative preparation, and postoperative care.

The Lung Cancer Surgical Study Group of the Japan Clinical Oncology Group: outstanding contribution and entering a new phase

The Lung Cancer Surgical Study Group (LCSSG) of the Japan Clinical Oncology Group (JCOG) was organized in 1986 and initially included 26 collaborative institutions, which has increased to 52 institutions currently. JCOG-LCSSG includes thoracic surgeons, medical oncologists, pathologists, and radiotherapists. In the early period, the JCOG-LCSSG mainly focused on combined modality therapies for lung cancer. Since the 2000s, the JCOG-LCSSG has investigated adequate modes of surgical resection for small-sized and peripheral non-small cell lung cancer and based on the radiological findings of whole tumor size and ground-glass opacity. Trials, such as JCOG0802, JCOG0804, and JCOG1211, have shown the appropriateness of sublobar resection, which has significantly influenced routine clinical practice. With the introduction of targeted therapy and immunotherapy, treatment strategies for lung cancer have changed significantly. Additionally, with the increasing aging population and medical costs, tailored medicine is strongly recommended to address medical issues. To ensure comprehensive treatment, strategies, including surgical and nonsurgical approaches, should be developed. Currently, the JCOG-LCSSG has conducted numerous clinical trials to adjust the diversity of lung cancer treatment strategies. This review highlights recent advancements in the surgical field, current status, and future direction of the JCOG-LCSSG.

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

OBJECTIVES

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.

METHODS

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.

RESULTS

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.

CONCLUSIONS

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.

Regional ventilation distribution before and after laparoscopic lung parenchymal resection

Objective.The aim of the present study was to evaluate the influence of one-sided pulmonary nodule and tumour on ventilation distribution pre- and post- partial lung resection.Approach.A total of 40 consecutive patients scheduled for laparoscopic lung parenchymal resection were included. Ventilation distribution was measured with electrical impedance tomography (EIT) in supine and surgery lateral positions 72 h before surgery (T1) and 48 h after extubation (T2). Left lung to global ventilation ratio (Fl), the global inhomogeneity index (GI), standard deviation of regional ventilation delay (RVDSD) and pendelluft amplitude (Apendelluft) were calculated to assess the spatial and temporal ventilation distribution.Main results.After surgery (T2), ventilation at the operated chest sides generally deteriorated compared to T1 as expected. For right-side resection, the differences were significant at both supine and left lateral positions (p< 0.001). The change of RVDSDwas in general more heterogeneous. For left-side resection, RVDSDwas worse at T2 compared to T1 at left lateral position (p= 0.002). The other EIT-based parameters showed no significant differences between the two time points. No significant differences were observed between supine and lateral positions for the same time points respectively.Significance.In the present study, we found that the surgery side influenced the ventilation distribution. When the resection was performed on the right lung, the postoperative ipsilateral ventilation was reduced and the right lung ratio fell significantly. When the resection was on the left lung, the ventilation delay was significantly increased.

Complete thoracoscopic lobectomy versus hybrid video-assisted thoracoscopic lobectomy for non-small cell lung cancer

OBJECTIVE

Video-assisted thoracoscopic surgery (VATS) is the standard approach to lobectomy for early-stage non-small cell lung cancer (NSCLC). However, there are many different types. One of its approaches is complete thoracoscopic surgery (CTS), which may be less invasive because of low chest wall stress. This study compared the treatment outcomes of CTS and hybrid VATS lobectomy for NSCLC.

METHODS

In total, 442 eligible patients with clinical N0 NSCLC underwent lobectomy between 2007 and 2016. Patients were classified into a group of patients who underwent CTS and a group of those who underwent hybrid VATS. Propensity score matching was performed between the two groups.

RESULTS

There were 175 patients after matching. The median follow-up period in the CTS and hybrid VATS groups was 60 and 63 months, respectively. The CTS group showed less blood loss (CTS, 50 mL vs. 100 mL, p = 0.005), fewer complications (CTS, 25.7% vs. 36.6%, p = 0.037), and shorter postoperative hospital stays (CTS, 8 days vs. 12 days, p < 0.001). There was no significant difference in the postoperative 30-day mortality rates. Between the patients who underwent CTS and hybrid VATS groups, the 5-year overall survival rates were 85.4% and 86.0% (p = 0.701), the relapse-free survival rates were 76.5% and 74.9% (p = 0.435), and the lung cancer-specific survival rates were 91.5% and 91.7% (p = 0.90), respectively.

CONCLUSIONS

CTS is less invasive and has superior short-term outcomes as an approach to lobectomy for early-stage NSCLC.

Fissure-first bilobectomy of a giant lung abscess combined with a squamous cell carcinoma via a minimally invasive open surgery

Background

Fissureless lobectomies are beneficial for preventing prolonged air leaks (PALs). Despite the widespread use of this technique in lobectomy cases, there have been no reports on fissureless bilobectomies to date.

Case presentation

A 73-year-old man with an 80-pack per year smoking history was diagnosed with a stage 1 primary squamous cell carcinoma in the right lower lobe. He developed a lung abscess inside the tumor 6 weeks after the cancer diagnosis and a surgical resection was planned. A middle and lower bilobectomy was mandatory because of the interlobar pulmonary artery involvement. We chose a fissureless technique to avoid any cancer dissemination and bacterial spillage. The thoracoscopic view revealed that the tumor volume was too large to flexibly mobilize. The minimally invasive open surgery (MIOS) approach was valuable in that it combined direct vision and a thoracoscopic maneuver for treating even a large, distended mass. He was discharged uneventfully 9 days after the operation.

Conclusions

The fissureless bilobectomy, in addition to preventing PALs, was a feasible option for preventing cancer dissemination and bacterial spillage for a lung abscess. The MIOS was a safe and minimally invasive approach for even a giant abscess that inhibited the flexible mobilization of the lung.