Publications by authors named "Seung Il Park"

Introduction: With the global aging, the number of elderly candidates for esophageal resection is increasing. However, studies on esophagectomy in elderly patients have yielded conflicting results, and individuals over 75 years old are frequently excluded from studies on esophageal cancer. This study aimed to analyze perioperative and survival outcomes post-esophagectomy in elderly patients using propensity score matching (PSM).

View Article and Find Full Text PDF

Background Sublobar resection for lung cancer is usually guided by cutoff values for consolidation size (maximal diameter of the solid tumor component) and consolidation-to-tumor ratio (CTR). The effects of these factors as continuous variables and the reason for established cutoffs are, to the knowledge of the authors, unexplored. Purpose To quantitatively assess the predictive value of CTR and consolidation size for cancer recurrence risk after sublobar resection in clinical stage IA lung adenocarcinoma.

View Article and Find Full Text PDF

Objectives: Invasive mucinous adenocarcinoma exhibits distinct prognostic outcomes compared to non-mucinous adenocarcinoma (ADC). This study investigated and compared the clinical outcomes and prognostic factors of invasive mucinous and non-mucinous ADC patients.

Methods: This retrospective study included patients who underwent curative surgery for ADC between 2011 and 2021.

View Article and Find Full Text PDF

To investigate long-term outcomes and develop a risk model for pathological multi-station N2 (pN2b) in patients who underwent upfront surgery for clinical single-station N2 (cN2a) non-small cell lung cancer (NSCLC). From 2006 to 2018, 547 patients who had upfront surgery for suspected cN2a NSCLC underwent analysis. A risk model for predicting pN2b metastasis was developed using preoperative clinical variables via multivariable logistic analysis.

View Article and Find Full Text PDF

Background: This study aimed to examine the clinical implications of selective station 4L lymph node dissection (S4L-LND) on survival in non-small cell lung cancer (NSCLC) and to evaluate its potential advantages.

Methods: We enrolled patients with primary left-sided NSCLC who underwent upfront video-assisted thoracoscopic surgery with R0 resection including lobectomy and segmentectomy, with or without S4L-LND, at our institution between January 2007 and December 2021. Following 1:1 propensity score matching (PSM), we compared overall survival (OS) and recurrence-free survival (RFS) between patients with and without S4L-LND.

View Article and Find Full Text PDF
Article Synopsis
  • - The study suggests a new way to classify non-small-cell lung cancer (NSCLC) by breaking down N2b stage patients into single-zone and multi-zone groups, based on the lymph node (LN) locations involved.
  • - It analyzed 996 NSCLC patients who had lobectomies between 2006 and 2019, finding that single-zone N2b patients had significantly better survival outcomes compared to multi-zone N2b patients.
  • - The findings propose that using both station-based and zone-based descriptors for N2 disease could lead to better staging and treatment decisions for patients with pN2 NSCLC.
View Article and Find Full Text PDF

Purpose: This study investigated the recurrence patterns and timing in patients with pathologic N2 (pN2) non-small cell lung cancer (NSCLC) according to the residual tumor (R) descriptor proposed by the International Association for the Study of Lung Cancer (IASLC).

Materials And Methods: From 2004 to 2021, patients with pN2 NSCLC who underwent anatomical resection were analyzed according to the IASLC R criteria using medical records from a single center. Survival analysis was performed using Cox proportional hazards models.

View Article and Find Full Text PDF

Background: Patients achieving pathological complete response (pCR) post-neoadjuvant chemoradiotherapy (nCRT) and surgery for locally advanced esophageal squamous cell carcinoma (ESCC) have a favorable prognosis. However, recurrence occurs in approximately 20-30% of all patients, with few studies evaluating their prognostic factors. We identified these prognostic factors, including inflammation-based markers, in patients with ESCC showing pCR after nCRT and surgery.

View Article and Find Full Text PDF

This study aimed to assess the lung transplantation (LT) outcomes of patients with right ventricular dysfunction (RVD), focusing on the impact of various extracorporeal membrane oxygenation (ECMO) configurations. We included adult patients who underwent LT with ECMO as a bridge-to-transplant from 2011 to 2021 at a single center. Among patients with RVD ( = 67), veno-venous (V-V) ECMO was initially applied in 79% (53/67) and maintained until LT in 52% (35/67).

View Article and Find Full Text PDF

Background: Standard antibiotic treatment for nontuberculous mycobacteria pulmonary disease (NTMPD) has unsatisfactory success rates. Pulmonary resection is considered adjunctive therapy for patients with refractory disease or severe complications, but surgical indications and extent of resection remain unclear. We present surgical treatment outcomes for NTMPD and analyzes risk factors for unfavorable outcomes.

View Article and Find Full Text PDF

Background: Thymic cysts are a rare benign disease that needs to be distinguished from low-risk thymoma. [F]fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) is a non-invasive imaging technique used in the differential diagnosis of thymic epithelial tumours, but its usefulness for thymic cysts remains unclear. Our study evaluated the utility of visual findings and quantitative parameters of [F]FDG PET/CT for differentiating between thymic cysts and low-risk thymomas.

View Article and Find Full Text PDF

Introduction: The aim of this study was to validate the discriminatory ability and clinical utility of the N descriptor of the newly proposed ninth edition of the TNM staging system for lung cancer in a large independent cohort.

Methods: We retrospectively analyzed patients who underwent curative surgery for NSCLC between January 2004 and December 2019. The N descriptor of patients included in this study was retrospectively reclassified based on the ninth edition of the TNM classification.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigated the impact of preserving the superior segment (S6) during common basal segmentectomy on lung volume and function compared to lower lobectomy in lung cancer patients.
  • Analysis involved 48 patients who underwent segmentectomies and 96 patients who had lobectomies, focusing on factors like age, preoperative lung function, and CT-measured lung volume.
  • Results indicated that segmentectomy led to a greater reduction in total lung volume immediately post-surgery and at long-term follow-up, with no significant benefit observed in preserving superior segment S6 for lung function preservation.
View Article and Find Full Text PDF

Background: Clonal hematopoiesis (CH) frequently progresses after chemotherapy or radiotherapy. We evaluated the clinical impact of preoperative CH on the survival outcomes of patients with non-small cell lung cancer (NSCLC) who underwent surgical resection followed by adjuvant therapy.

Methods: A total of 415 consecutive patients with NSCLC who underwent surgery followed by adjuvant therapy from 2011 to 2017 were analyzed.

View Article and Find Full Text PDF

Background: Acute exacerbation of interstitial lung disease (AE-ILD) significantly impacts prognosis, leading to high mortality rates. Although lung transplantation is a life-saving treatment for selected patients with ILD, its outcomes in those presenting with AE-ILD have yielded conflicting results compared with those with stable ILD. This study aims to investigate the impact of pre-existing AE on the prognosis of ILD patients who underwent lung transplantation.

View Article and Find Full Text PDF
Article Synopsis
  • Primary mediastinal germ cell tumors (MGCTs) are rare tumors that have a worse prognosis compared to gonadal germ cell tumors; a study analyzed 35 MGCT patients using [F]FDG PET/CT for better understanding.
  • Visual assessment found that uptake intensity was a significant factor in distinguishing benign from malignant MGCTs, while quantitative analysis revealed that SUVmax and other parameters were significantly higher in malignant cases.
  • The SUVmax showed strong predictive ability in differentiating tumor types and correlating with serum alpha-fetoprotein (AFP) levels, indicating its potential as a diagnostic tool for MGCTs.
View Article and Find Full Text PDF

Background: The prognostic significance of extranodal extension (ENE) remains unclear in patients with pathologic N1 (pN1) non-small-cell lung cancer (NSCLC) undergoing surgery. We evaluated the prognostic impact of ENE in patients with pN1 NSCLC.

Methods: From 2004 to 2018, we retrospectively analyzed the data of 862 patients with pN1 NSCLC who underwent lobectomy and more (lobectomy, bilobectomy, pneumonectomy, sleeve lobectomy).

View Article and Find Full Text PDF
Article Synopsis
  • Airway complications after lung transplantation are significant, occurring in about 21.9% of patients reviewed over a median follow-up of 20 months.
  • The most frequent complication was bronchial stenosis, affecting 16.8% of patients.
  • Key risk factors identified include a body mass index ≥ 25 kg/m and postoperative extracorporeal membrane oxygenation (ECMO), and most patients with complications were treated through bronchoscopic interventions, with overall survival rates remaining similar between those with and without complications.
View Article and Find Full Text PDF
Article Synopsis
  • This study examined how the histologic type of non-small cell lung cancer (NSCLC) affects survival and recurrence rates in stage II and III patients.
  • A total of 2155 patients were analyzed, revealing that those with squamous cell carcinoma (SqCC) had better rates of freedom from recurrence compared to those with adenocarcinoma (ADC).
  • Although ADC patients had a slightly better overall survival at the five-year mark, the difference was not statistically significant, and SqCC patients faced higher non-lung cancer mortality and shorter time from recurrence to death.
View Article and Find Full Text PDF

Background: We reviewed the clinical outcomes of patients with oligometastatic (OM) non-small cell lung cancer (NSCLC) who received multimodal therapy including lung surgery.

Methods: We retrospectively analyzed 117 patients with OM NSCLC who underwent complete resection of the primary tumor from 2014 to 2017.

Results: The median follow-up duration was 2.

View Article and Find Full Text PDF

Background: Although there are numerous postoperative surveillance guidelines for non-small cell lung cancer (NSCLC), most guidelines recommend the same protocol for patients with different recurrence dynamics. In this study, we investigated the recurrence dynamics of NSCLC patients according to their clinical factors.

Methods: We retrospectively reviewed the data from NSCLC patients who underwent complete resection between 2007 and 2017.

View Article and Find Full Text PDF

Purpose: Imaging biomarkers for rib mass are needed to optimize treatment plan. We investigated the diagnostic value of metabolic and volumetric parameters from 18F-fluorodeoxyglucose (FDG) positron-emission tomography/computed tomography (PET/CT) in discriminating between benign and malignant lesions of the ribs.

Patients And Methods: Fifty-seven patients with pathologically proven diagnosis of rib lesions were retrospectively enrolled.

View Article and Find Full Text PDF

Purpose: This multi-center, retrospective study was conducted to evaluate the long-term survival in patients who underwent surgical resection for small cell lung cancer (SCLC) and to identify the benefit of adjuvant therapy following surgery.

Materials And Methods: The data of 213 patients who underwent surgical resection for SCLC at four institutions were retrospectively reviewed. Patients who received neoadjuvant therapy or an incomplete resection were excluded.

View Article and Find Full Text PDF

Objectives: The aim of this study was to develop a deep learning (DL)-based segmentation algorithm for automatic measurement of metabolic parameters of 18F-FDG PET/CT in thymic epithelial tumors (TETs), comparable performance to manual volumes of interest.

Patients And Methods: A total of 186 consecutive patients with resectable TETs and preoperative 18F-FDG PET/CT were retrospectively enrolled (145 thymomas, 41 thymic carcinomas). A quasi-3D U-net architecture was trained to resemble ground-truth volumes of interest.

View Article and Find Full Text PDF