Prognosis of spread through air spaces in invasive mucinous lung adenocarcinoma after curative surgery

INTRODUCTION

The purpose of this study is to investigate the prognostic impact of spread through air spaces (STAS) in invasive mucinous adenocarcinoma (IMA).

MATERIALS AND METHODS

From 2015 to 2019, patients who underwent complete resection of IMA were extracted from the prospective database. Multivariable Cox-regression analysis and inverse probability of treatment weight (IPTW) - adjusted log-rank test for 5-year recurrence-free survival (RFS) were performed.

RESULTS

STAS was observed in 39.1% (53 out of 133). The STAS (+) group shows larger tumor size (2.9 ± 2.4 cm vs 3.8 ± 2.4 cm, p = 0.031) and higher incidence of lympho-vascular invasion (6 [7.5%] vs 18 [34.0%], p < 00.001) compared to the STAS (-) group. The 5-year RFS was 66.1% in the STAS (+) group and 91.8% in the STAS (-) group (p < 00.001), and the incidence of locoregional recurrence was significantly higher in the STAS (+) group than the STAS (-) group (1 [1.2%] vs 12 [22.6%], p < 00.001). Multivariable analysis revealed that STAS was associated with poor prognosis for all-recurrence (hazard ratio 2.81, 95% confidence interval 1.01-7.81, p = 0.048). After IPTW adjustment, 5-year RFS was 66.3% in the STAS (+) group and 92.9% in the STAS (-) group (p = 0.007), and risk for locoregional recurrence was greater in the STAS (+) group than the STAS (-) group (1.1 [0.9%] vs 20.8 [16.6%], p < 00.001).

CONCLUSIONS

STAS showed negative prognostic impact on all-recurrence, especially due to locoregional recurrence, after curative resection of IMA.

Risk factors for discontinuing intravenous patient-controlled analgesia after thoracic surgery

PURPOSE

This study examined the risk factors of experiencing side effects from using intravenous patient-controlled analgesia (IV PCA) following lung and esophageal surgery.

METHODS

Our study included adult patients who underwent lung or esophageal surgery and received IV PCA for postoperative acute pain control between 2020 and 2022. We collected information on side effects from IV PCA use, the decision to discontinue PCA, and the PCA regimen from the daily reports of the acute pain management team and verified the accuracy using electronic records from ward nurses. The primary outcome was the risk factor associated with discontinuing IV PCA due to its side effects.

RESULTS

Out of the 1796 patients in our study, 1795 used PCA containing opioids; 196 patients stopped IV PCA due to unbearable side effects. Being female (adjusted odds ratio [aOR]: 2.65, 95% confidence interval [CI]: 1.70, 4.13) was linked to a higher chance of stopping PCA use. Having hypertension (aOR: 0.46, 95% CI: 0.26, 0.81) and being classified as the American Society of Anesthesiologists class 3 or higher (aOR: 0.48, 95% CI: 0.23, 0.86) were associated with a lower chance of discontinuing PCA use.

CONCLUSION

Our study determined the risk factors to stop using IV PCA due to side effects following lung or esophageal surgery. These results emphasize the need for personalized pain management plans that take into account the patient's characteristics and the type of surgery performed.

The Optimal Treatment Strategy for Postoperative Anastomotic Leakage After Esophagectomy: a Comparative Analysis Between Endoscopic Vacuum Therapy and Conventional Treatment

BACKGROUND

We compared the clinical outcomes between endoscopic vacuum therapy (EVT) and conventional treatment (CT) for the management of post-esophagectomy anastomotic leakage.

METHODS

A retrospective review of the medical records of patients who underwent esophagectomy with esophagogastrostomy from November 2003 to August 2021 was conducted. Thirty-four patients who developed anastomotic leakage were analyzed according to whether they underwent CT (n = 13) or EVT (n = 21).

RESULTS

The median time to complete healing was significantly shorter in the EVT group than in the CT group (16 [4-142] days vs. 70 [8-604] days; p = 0.011). The rate of clinical success was higher in the EVT group (90.5%) than in the CT group (66.7%, p = 0.159). A subgroup analysis showed more favorable outcomes for EVT in patients with thoracic leakage, including a higher clinical success rate (p = 0.037), more rapid complete healing (p = 0.004), and shorter hospital stays (p = 0.006). However, the results were not significantly different in patients with cervical leakage. Anastomotic strictures occurred in 3 EVT patients (14.3%) and 5 CT patients (50.0%) (p = 0.044), and the EVT group showed a trend towards improved freedom from anastomotic strictures (p = 0.105).

CONCLUSIONS

EVT could be considered as an adequate treatment option for post-esophagectomy anastomotic leakage. EVT might have better clinical outcomes compared to CT for managing anastomotic leakage after transthoracic esophagogastrostomy, and further studies are needed to evaluate the effectiveness of EVT in patients who undergo cervical esophagogastrostomy.

Surgical outcomes of thoracoscopic thymectomy via the single-port subxiphoid approach versus the unilateral intercostal approach

OBJECTIVES

The purpose of this study was to explore the safety and feasibility of video-assisted thoracic surgery (VATS) total thymectomy via the single-port subxiphoid approach compared with the intercostal approach.

METHODS

From January 2018 to May 2022, patients who underwent VATS total thymectomy via the subxiphoid or unilateral intercostal approach and diagnosed with Masaoka-Koga stage I-II, non-myasthenic thymoma were included in this study. Perioperative outcomes, immediate and long-term pain evaluations were compared in a propensity score-matching analysis.

RESULTS

In total, 95 patients were included and underwent the subxiphoid approach (n = 37) and the intercostal approach (n = 58). Propensity score yielded 2 well-matched cohorts of 30 patients and there was no significant demographical imbalance between the 2 groups. Compared with the intercostal approach, the subxiphoid group demonstrated favourable perioperative outcomes including the intraoperative blood loss (P = 0.025) and the median duration of hospital stay (P = 0.083). The immediate and long-term pain evaluations revealed that the subxiphoid group reported lower visual analogue scales at postoperative 24 h and lower total doses of fentanyl bolus infusions during hospitalization (P = 0.004 and 0.018, respectively), along with lower long-term neuropathic pain scale scores (P = 0.005) than patients in the intercostal group.

CONCLUSIONS

VATS thymectomy via the single-port subxiphoid approach showed favourable perioperative outcomes compared to the intercostal approach. Moreover, the subxiphoid approach seemed both to cause minimal immediate postoperative pain and to have advantages in reducing long-term neuropathic pain compared with the intercostal approach.

Prognostic Significance of the Extranodal Extension of Regional Lymph Nodes in Stage III-N2 Non-Small-Cell Lung Cancer after Curative Resection

The present study investigated the prognostic role of extranodal extension (ENE) in stage III-N2 non-small-cell lung cancer (NSCLC) following curative surgery. From January 2005 to December 2018, pathologic stage III-N2 disease was diagnosed in 371 patients, all of whom underwent anatomic pulmonary resection accompanied by mediastinal lymph node dissection. This study included 282 patients, after excluding 89 patients who received preoperative chemotherapy or incomplete surgical resection. Their lymph nodes were processed; after hematoxylin and eosin staining, histopathologic slides of the metastatic nodes were reviewed by a designated pathologist. Predictors of disease free survival (DFS), including age, sex, operation type, pathologic T stage, nodal status, visceral pleural invasion, perioperative treatment, and the presence of ENE, were investigated. Among the 282 patients, ENE was detected in 85 patients (30.1%). ENE presence was associated with advanced T stage (p = 0.034), N2 subgroups (p < 0.001), lymphatic invasion (p = 0.001), and pneumonectomy (p = 0.002). The multivariable analysis demonstrated that old age (p < 0.001), advanced T stage (p = 0.012), N2 subgroups (p = 0.005), and ENE presence (p = 0.005) were significant independent predictors of DFS. The DFS rate at five years was 21.4% in patients who had ENE and 43.4% in patients who did not have ENE (p < 0.001). The presence of ENE, coupled with tumor-node-metastasis staging, should be recognized as a meaningful prognostic factor in stage III-N2 NSCLC patients.

Outcomes and Patency of Complex Configurations of Composite Grafts Using Bilateral Internal Thoracic Arteries

Background

It is generally agreed that using a bilateral internal thoracic artery (BITA) composite graft improves long-term survival after coronary artery bypass grafting (CABG). Although the left internal thoracic artery (LITA)-based Y-composite graft is widely adopted, technical or anatomical difficulties necessitate complex configurations. We aimed to investigate whether BITA configuration impacts survival or patency in patients undergoing coronary revascularization.

Methods

Between January 2006 and June 2017, 1,161 patients underwent CABG at Seoul National University Bundang Hospital, where the standard technique is a LITA-based Y-composite graft with the right internal thoracic artery (RITA) sequentially anastomosed to non-left anterior descending (LAD) targets. Total of 160 patients underwent CABG using BITA with modifications. Their medical records and imaging data were reviewed retrospectively to investigate technical details, clinical outcomes, and graft patency.

Results

Modifications of the typical Y-graft (group 1, n=90), LITA-based I-graft (group 2, n=39), and RITA-based composite graft (group 3, n=31) were used due to insufficient RITA length (47%), problems using LITA (28%), and target vessel anatomy (25%). The overall 30-day mortality rate was 1.9%. Among 116 patients who underwent computed tomography or conventional angiography at a mean interval of 29.9±33.1 months postoperatively, the graft patency rates were 98.7%, 95.3%, and 83.6% for the LAD, left circumflex artery, and right coronary artery territories, respectively. Patency rates for the inflow, secondary, and tertiary grafts were 98.2%, 90.5%, and 80.4%, respectively. The RITA-based graft (group 3) had the lowest patency rate of the various configurations (p<0.011).

Conclusion

LITA-based Y composite graft, showed satisfactory clinical outcomes and patency whereas modifications of RITA-based composite graft had the lowest patency and 5-year survival rates. Therefore, when using RITA-based composite graft, other options should be considered before proceeding atypical configurations.

Incomplete Form of Shone Complex in an Adult Congenital Heart Disease Patient

Shone complex is a rare congenital disorder that involves 4 obstructive lesions of the left heart, as follows: parachute mitral valve, supravalvular mitral ring, subaortic stenosis, and coarctation of the aorta. Incomplete forms with 2 or 3 of these lesions in adult patients have been rarely reported in the literature, meaning that insufficient general data exist concerning the surgical strategy and clinical follow-up. Herein, we report the case of a 31-year-old woman with a diagnosis of incomplete form of Shone complex with parachute mitral valve and coarctation of the aorta who underwent successful single-stage surgical repair.

Observership in Shanghai, China-meeting emerging leading pioneers of robotic thoracic surgery and ERAS

China is irrefutably a growing giant in thoracic surgery with unparalleled number of surgical cases and increasing academic researches given the rapidly accumulated data. The ESTS and the AME Publishing Group enable exciting opportunity to exchange ideas, discuss new clinical techniques, and foster rich experience in surgical education through valuable international observership award. This year's visiting scholarship allows collaboration between South Korea and China, two very close but disparate countries. This is a perspective paper discussing the current thoracic surgery training in South Korea and it attempts to outline objectives in visiting scholarships from a third-year resident's point of view.