Publications by authors named "Yong Soo Choi"

Although esophageal cancer survivors experience lower health-related quality of life (HRQoL), it is hard to provide proper supportive care due to difficulties to find potential target population. This study aims to develop a trial-ready cohort (TRC) to assess the unmet needs and HRQoL of survivors of esophageal cancer. This prospective, multicenter TRC study will include 600 patients diagnosed with primary esophageal cancer who have undergone curative treatment.

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Case: Three elderly men presented with thoracic radiculopathy secondary to bony thoracic foraminal stenosis. Conservative treatment was unsuccessful, so each underwent posterolateral full-endoscopic thoracic foraminotomy under local anesthesia. Surgical steps included drilling of the lateral part of the facet, clearing of soft tissues in the foramen, and adequate decompression of the exiting nerve root.

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Purpose: The surveillance protocol for early-stage non-small cell lung cancer (NSCLC) is not contingent upon individualized risk factors for recurrence. This study aimed to use comprehensive data from clinical practice to develop a deep-learning model for practical longitudinal monitoring.

Methods: A multimodal deep-learning model with transformers was developed for real-time recurrence prediction using baseline clinical, pathological, and molecular data with longitudinal laboratory and radiologic data collected during surveillance.

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Background: This study aimed to evaluate the efficacy and safety of adjuvant pembrolizumab in patients with completely resected stage I lung adenocarcinoma with micropapillary or solid-pattern (MPSOL).

Methods: This was a single-center, single-arm phase 2 study (ClinicalTrials.gov identifier: NCT03254004).

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Mitochondrial transplantation has emerged as a promising strategy for treating ischemic diseases by restoring mitochondrial function in damaged tissues. This study investigated the therapeutic potential of mitochondria isolated from placenta-derived mesenchymal stem cells (PD-MSCs) in a murine critical limb ischemia (CLI) model. The isolated mitochondria were characterized to confirm their structural integrity, purity, and ATP production capacity before transplantation into an ischemic hindlimb.

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The evolving TNM classification has emphasized the tumor size's role in NSCLC prognosis, reclassifying stage IIIA patients from the previous edition as stage IIIB (T3-4N2M0, 8th edition). However, the prognostic implications of tumor size and survival in stage III NSCLC patients undergoing neoadjuvant therapy remain unexplored. Therefore, we investigated the association between tumor size and mortality in N2 non-small cell lung cancer (NSCLC) patients undergoing neoadjuvant concurrent chemoradiotherapy followed by surgery (trimodality therapy), considering the number of metastatic N2 stations and histology.

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Objective: To analyze costs and cost-effectiveness of transforaminal endoscopic thoracic discectomy (TETD) for the treatment of symptomatic thoracic disc herniation (TDH) and compare it with open microdiscectomy (MD).

Methods: This retrospective cohort study included patients who underwent TETD or MD for symptomatic TDH and had a minimum follow-up of 1 year. Cost analysis included direct costs (primary and secondary hospital costs), indirect costs (lost wages due to work absence), total costs (direct + indirect), and cost-effectiveness (cost per quality-adjusted life year [QALY] and incremental cost-effectiveness ratio [ICER]).

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Background: The effect of lymph node (LN) dissection on the overall survival of patients with esophageal squamous cell carcinoma (ESCC) treated by neoadjuvant chemoradiation therapy (nCRT) followed by esophagectomy has been controversial. This study investigated the patterns of metastatic LNs after nCRT and the benefits of LN dissection using the efficacy index (EI).

Methods: The EI was calculated by multiplying the frequency (%) of metastases to a zone and the 5-year overall survival rate (%) of patients with metastases to that zone and then dividing by 100.

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Background: Lung cancer patients with stage III-N2 disease may benefit from the subclassification of nodal involvement before decision-making. We aimed to evaluate whether the clinical N descriptor subclassification predicts prognosis in patients undergoing trimodality therapy for stage III-N2 non-small cell lung cancer.

Methods: Using our institutional registry between 2003 and 2019, we analyzed 899 consecutive patients with stage III-N2 non-small cell lung cancer undergoing neoadjuvant concurrent chemoradiotherapy followed by surgery.

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Objective: Transforaminal endoscopic thoracic discectomy (TETD) has been shown to lead to favorable outcomes in cases with symptomatic thoracic disc herniation (TDH). However, due to various anatomical constraints, developing a transforaminal corridor especially in the upper and middle thoracic spine is often difficult and foraminoplasty is required to gain access into the foramen. Conventional foraminoplasty with a bone reamer or endoscopic drill can be associated with inadvertent facet removal and increases the risk of injury to the neural tissue.

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Contrast-enhanced chest CT (CECT) is more sensitive than non-contrast-enhanced chest CT (NCECT), but NCECT may have comparable efficacy in detecting new primary lung cancer among stage I NSCLC survivors after two years of surveillance. This study aimed to evaluate the efficacy of NCECT versus CECT for surveillance among stage I NSCLC patients surviving two years after curative resection without disease recurrence. We conducted a retrospective cohort study of patients with stage I NSCLC who underwent curative-intent lung resection between January 2009 and December 2017 using the Registry for Thoracic Cancer Surgery at the Samsung Medical Center, Seoul, Korea.

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Understanding the patterns of lymph node (LN) metastases in esophageal squamous cell carcinoma (ESCC) is important for accurate staging and defining the extent of lymphadenectomy. This study clarified the patterns of LN metastases in ESCC using data mining techniques. 1181 patients with LN metastases who underwent upfront esophagectomy for ESCC were analyzed.

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Background: The American Joint Committee on Cancer (AJCC) 8th edition and Japanese classification 12th edition can be applied for esophageal cancer staging. This retrospective study aimed to compare these two staging systems in patients with surgically treated esophageal squamous cell carcinoma (ESCC).

Methods: We retrospectively reviewed 2,853 patients who underwent esophagectomy and lymphadenectomy from 1994 to 2020.

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Background A comprehensive assessment of skeletal muscle health is crucial to understanding the association between improved clinical outcomes and obesity as defined by body mass index (BMI; calculated as weight in kilograms divided by height in meters squared) in lung cancer, but limited studies have been conducted on this topic. Purpose To investigate the association between BMI-defined obesity and survival in patients with non-small cell lung cancer who underwent curative resection, with a specific focus on the status of skeletal muscle assessed at CT. Materials and Methods This retrospective study investigated Korean patients with non-small cell lung cancer who underwent curative resection between January 2008 and December 2019.

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Background: Sublobar resection is increasingly recognized as an effective treatment for early-stage NSCLC. However, no studies to date have investigated the potential role of preoperative ctDNA detection in guiding surgical decisions, such as opting for sublobar resection, in stage I NSCLC.

Methods: Patients with solid-dominant (CTR>0.

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The interaction between environmental factors affecting honey bees is of growing concern due to their potential synergistic effects on bee health. Our study investigated the interactive impact of Varroa destructor and chlorothalonil on workers' survival, fat body morphology, and the expression of gene associated with detoxification, immunity, and nutrition metabolism during their adult stage. We found that both chlorothalonil and V.

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Article Synopsis
  • Neoadjuvant chemoradiotherapy (nCRT) before surgery is the main treatment for locally advanced esophageal squamous cell cancer, with three regimens compared for effectiveness and safety in patients treated between 2016 and 2022.
  • Overall survival rates were best with the CROSS regimen, showing 88.1% at one year, while pathologic complete response (pCR) rates were similar across all regimens.
  • Grade 3 toxicities varied by regimen, with the CROSS group experiencing the least adverse effects and weight loss, suggesting it may be the preferable option for treatment.
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Article Synopsis
  • * A total of 680 patients were analyzed, and after balancing confounding factors through propensity score matching, key outcomes like lymph node dissection and survival rates were compared.
  • * Results indicated that both techniques yielded similar overall survival rates and oncological outcomes, suggesting they are both viable options for treating mid-to-lower ESCC.
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The aim of our retrospective study is to develop and assess an imaging-based model utilizing F-FDG PET parameters for predicting the five-year survival in non-small-cell lung cancer (NSCLC) patients after curative surgery. A total of 361 NSCLC patients who underwent curative surgery were assigned to the training set ( = 253) and the test set ( = 108). The LASSO regression model was used to construct a PET-based risk score for predicting five-year survival.

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Objectives: The use of tumor-informed circulating tumor DNA (ctDNA) testing in patients with early-stage disease before surgery is limited, mainly owing to restricted tissue access and extended turnaround times. This study aimed to evaluate the clinical value of a tumor-naïve, methylation-based cell-free DNA assay in a large cohort of patients with resected NSCLC.

Method: We analyzed presurgical plasma samples from 895 patients with EGFR and anaplastic lymphoma kinase-wild-type, clinical stage I or II NSCLC.

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Honey bee reproductive behavior involves a complicated mating system that embodies a number of factors, including environmental and human-induced factors. Controlled breeding in isolated mating stations is a prerequisite to maintain the genetic resources of honey bees through natural mating. The concept of controlled mating is a challenge in most beekeeping operations due to its low mating success rate.

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Article Synopsis
  • This study looked at patients with oesophageal squamous cell carcinoma who couldn't or chose not to have surgery after receiving neoadjuvant chemoradiotherapy (nCRT).
  • Of the 715 patients analyzed, 105 (14.7%) didn't undergo surgery, with reasons including disease progression, functional decline, or patient refusal.
  • Results showed that patients who refused surgery had significantly worse recurrence-free survival (RFS) rates compared to those who had surgery, especially if they had a partial or stable response to treatment, although overall survival (OS) rates were not significantly different between the two groups.
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Article Synopsis
  • Occult lymph node metastasis (OLNM) is common in patients with resectable non-small cell lung cancer (NSCLC), despite following established diagnostic guidelines.
  • The study evaluated the risk of OLNM based on specific radiologic characteristics of primary tumors as seen on CT scans in a retrospective analysis of 2042 NSCLC patients.
  • Findings revealed that certain tumor features, such as endobronchial location, significantly increased the risk of OLNM, while others, like heterogeneous ground-glass opacity, had a lower risk, helping clinicians better determine the need for invasive nodal staging.
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Article Synopsis
  • The study evaluated the effectiveness and safety of adjuvant pembrolizumab in patients with stage IIIA/N2 non-small cell lung cancer (NSCLC) who underwent prior neoadjuvant chemoradiation therapy and complete surgical resection.
  • Findings showed a median disease-free survival (DFS) of 22.4 months and a 5-year DFS rate of 29%, indicating pembrolizumab may help control the disease long-term for some patients.
  • Despite some patients experiencing tumor recurrence, no new safety concerns were observed, suggesting that pembrolizumab could be a viable treatment option post-surgery for specific NSCLC patients.
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Article Synopsis
  • The study examines the risks of complications following major lung surgery after neoadjuvant concurrent chemoradiation therapy in patients with stage IIIA-N2 non-small cell lung cancer.
  • It reveals that patients over 70 years old, those with low body mass index, and those undergoing pneumonectomy face significantly higher rates of morbidity and mortality post-surgery.
  • The findings suggest that alternative treatments may be more suitable for high-risk patients, particularly the elderly or those with poorer lung function, rather than pursuing surgical options.
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