Publications by authors named "Yong-Jin Cho"

PurposeAlthough clavicular fracture nonunion is uncommon, it can lead to pain and alterations in clavicular length, potentially affecting shoulder function. This study investigated the relationship between clavicular length changes and clinical outcomes following nonunion treatment.MethodsThis retrospective study included 30 patients who underwent surgical treatment for clavicular nonunion between January 2013 and December 2021.

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Background: The relationship between cigarette smoking and nonalcoholic fatty liver disease (NAFLD) remains controversial. Recent studies have demonstrated that cigarette smoking is a significant risk factor for the development of NAFLD. This study aimed to examine the association between smoking and NAFLD according to smoking status among Korean males, and to examine the relationship between smoking cessation and NAFLD.

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We explored effects of (1) training with various sample sizes of multi-site vs. single-site training data, (2) cross-site domain adaptation, and (3) data sources and features on the performance of algorithms segmenting cerebral infarcts on Magnetic Resonance Imaging (MRI). We used 10,820 annotated diffusion-weighted images (DWIs) from 10 university hospitals.

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Background: High patient volumes are associated with better stroke management and outcomes. However, in sparsely populated regions, patients with stroke frequently rely on low-volume hospitals for acute care. This study evaluates the performance of high-performing hospitals among low-volume hospitals and identifies factors contributing to their high performance despite treating fewer stroke cases.

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Backgrounds And Aims: This study investigates the temporal patterns of occult cancer incidence among survivors of acute ischemic stroke (AIS), with a focus on variations by underlying stroke etiology.

Patients And Methods: We analyzed data from a prospective, multicenter stroke registry and a national claims database, identifying AIS patients hospitalized between 2011 and 2013. Patients were categorized by stroke etiology into two groups: unidentified stroke etiology (USE) and identified stroke etiology (ISE).

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Background: Elevated heart rate in patients with acute ischemic stroke is associated with increased risk of mortality. Beta-blocker therapy is well known to reduce heart rate.

Methods And Results: This study was a post hoc analysis of patients with acute ischemic stroke with maximum heart rates ≥100 bpm.

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Purpose: To validate JLK-LVO, a software detecting large vessel occlusion (LVO) on computed tomography angiography (CTA), within a multicenter dataset.

Methods: From 2021 to 2023, we enrolled patients with ischemic stroke who underwent CTA within 24-hour of onset at six university hospitals for validation and calibration datasets and at another university hospital for an independent dataset for testing model calibration. The diagnostic performance was evaluated using area under the curve (AUC), sensitivity, and specificity across the entire study population and specifically in patients with isolated middle cerebral artery (MCA)-M2 occlusion.

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Background: This study aims to evaluate temporal trends of advanced treatments and related clinical outcomes of ischemic stroke through a decade-long trend analysis, using data from a comprehensive, national, multicenter registry. We also seek to identify areas in need of improvement.

Methods And Results: This analysis involved patients with ischemic stroke or transient ischemic attack registered prospectively in the CRCS-K-NIH (Clinical Research Center for Stroke in Korea-National Institute of Health) registry between 2011 and 2020.

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Leucine-rich repeat-containing G-protein-coupled receptor 4 (LGR4, also known as GPR48) is a membrane receptor that negatively regulates the RANK signaling cascade during osteoclastogenesis. Traditionally, cell signaling and endocytic membrane trafficking via membrane receptors have been considered distinct processes; however, they are now recognized to be closely and bidirectionally linked. The present study investigated the difference between membrane-bound and endosomal LGR4 signaling and whether the LGR4 signaling pathway influences RANK-RANKL signaling during RANKL-induced osteoclastogenesis.

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Background And Purpose: Previous research on patients with acute ischemic stroke (AIS) has shown a 0.5% incidence of major gastrointestinal bleeding (GIB) requiring blood transfusion during hospitalization. The existing literature has insufficiently explored the long-term incidence in this population despite the decremental impact of GIB on stroke outcomes.

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Background: Research specifically addressing the efficacy of rosuvastatin versus atorvastatin in patients with ischemic stroke is insufficient. Using a large stroke registry, we investigated whether 2 commonly used statins, rosuvastatin and atorvastatin, differ in their effectiveness in reducing the risk of vascular events in patients with acute ischemic stroke.

Methods: We analyzed data from a nationwide stroke registry in South Korea between January 2011 and April 2022.

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Background: This study aimed to explore the association between admission HbA1c and the risk of 1-year vascular outcomes stratified by age group in patients with acute ischemic stroke (AIS) and diabetes mellitus (DM).

Methods: This study analyzed prospective multicenter data from patients with AIS and DM. Admission HbA1C were categorized as:≤6.

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Article Synopsis
  • This study examined how non-traditional lipid profiles, specifically the LDL/HDL ratio, affect the risk of vascular events within a year in stroke patients already on statins and with low LDL-C levels.
  • The analysis included 7028 patients with acute ischemic strokes and found a significant association between higher LDL/HDL ratios and increased risk of recurrent stroke, heart attack, or death after adjusting for other variables.
  • The results suggest that even with low LDL-C levels due to statin use, monitoring the LDL/HDL ratio is important to assess residual risk after a stroke.
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  • A multi-center MRI study investigated how white matter hyperintensity (WMH) affects recovery after stroke, focusing on different severity levels of ischemic stroke.
  • Higher WMH levels were linked to worse outcomes three months later, but the impact varied based on initial stroke severity: mild strokes showed a dose-dependent effect while moderate-to-severe strokes had a threshold effect.
  • The study found that WMH impacted 3-month recovery more significantly in those with mild strokes, suggesting that increased WMH burden worsens recovery, but its effect is less pronounced in more severe strokes.
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  • Primary leiomyosarcoma of the bone (LMSB) is a rare and aggressive cancer with limited treatment options, often leading to diagnostic challenges due to its similar features to more common tumors.
  • A 20-year-old female was diagnosed with LMSB after an initial biopsy mistakenly identified it as a giant cell tumor with aneurysmal bone cyst-like changes. Further examination confirmed the correct diagnosis.
  • The patient underwent wide excision of the tumor and received chemoradiation therapy, resulting in complete removal of the mass and improvement of symptoms without any relapses, highlighting the importance of accurate diagnosis.
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  • The report offers updated statistics on stroke patients in South Korea from a nationwide registry, revealing a male-to-female ratio of 1.5, with average ages of 67 for men and 73 for women.
  • Hypertension is the leading risk factor (67%), with notable rates of diabetes (35%) and smoking (21%), while atrial fibrillation is less common (19%) than in Western populations, indicating effective preventive measures.
  • There has been a decline in intravenous thrombolysis use, unchanged timing for treatment, and despite favorable outcomes at 3 months, there is a pressing need for improvements in acute stroke care.
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  • A study was conducted to develop deep learning algorithms for the automatic segmentation of white matter hyperintensity (WMH) lesions in patients with cerebral infarction, involving a large dataset of 8,421 patients from multiple hospitals in Korea.
  • Two models, 2D UNet and SE-Unet, were trained and validated using FLAIR MRI images, with performance measured against a human-segmented gold standard using various statistical metrics.
  • Results showed that while both models had good performance, the SE-Unet outperformed the UNet with higher average Dice Similarity Coefficients (DSCs) in both internal and external validations, indicating it was more reliable for WMH segmentation.
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  • - The study reviews how dual antiplatelet therapy (DAPT-AC) with aspirin and clopidogrel has been increasingly used among stroke patients who didn't qualify for major clinical trials, particularly after the CHANCE trial results became available in 2013.
  • - Analysis of data from over 32,000 patients from 2008 to 2022 showed that the usage of DAPT-AC rose significantly from 33% in 2008 to 78% in 2022, while the use of other antiplatelet medications decreased.
  • - Despite this increase in DAPT-AC usage, clinical outcomes, including stroke rates and mortality, improved only slightly, indicating ongoing efforts are needed to enhance recovery
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Background: The landscape of stroke care has shifted from stand-alone hospitals to cooperative networks among hospitals. Despite the importance of these networks, limited information exists on their characteristics and functional attributes.

Methods: We extracted patient-level data on acute stroke care and hospital connectivity by integrating national stroke audit data with reimbursement claims data.

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Article Synopsis
  • - The study focused on understanding what causes smokers to relapse after completing a 5-day cessation program in Korea, involving 518 participants followed for 6 months.
  • - A predictive logistic model was created to evaluate relapse risk, with a 38.4% relapse rate observed in participants after the program.
  • - Both the logistic regression model and the risk score model showed similar effectiveness in predicting relapse, utilizing six identified risk factors.
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Objective: We evaluated the efficacy of endovascular thrombectomy (EVT) on the functional outcome of patients with acute basilar artery occlusion and low posterior circulation acute stroke prognosis early computed tomography score (PC-ASPECTS).

Methods: We identified patients with acute ischemic stroke due to basilar artery occlusion and PC-ASPECTS of 6 or less, presenting within 24 h between August 2008 and April 2022. The primary outcome was a favorable functional outcome, defined as a modified Rankin Scale (mRS) score of 0-3 at 90 days.

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  • Novel oral anticoagulants (NOACs) are recommended for stroke prevention in patients with acute ischemic stroke (AIS) and atrial fibrillation (AF), but their real-world effectiveness is unclear.
  • This study analyzed data from nearly 13,000 patients over eight years to examine trends in clinical outcomes related to AIS and AF, particularly looking at how NOAC prescriptions influenced these trends.
  • Results showed that NOAC prescriptions rose significantly from 0% to 75.6%, correlating with a decrease in 1-year incidences of major adverse outcomes from 28.3% to 21.7%, suggesting NOACs may play a key role in improving patient outcomes.
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  • Ischemic strokes vary in type, which may affect how low-density lipoprotein (LDL) cholesterol levels relate to early health outcomes like stroke recurrence, heart attacks, and overall mortality.
  • A study involving over 38,500 acute ischemic stroke patients found that those with the lowest LDL cholesterol levels (<70 mg/dl) had the highest rates of adverse outcomes within three months.
  • The research revealed that the relationship between LDL cholesterol levels and mortality differed by stroke subtype, indicating that both high and low LDL levels present different risks depending on the stroke type.
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Background: There is limited information on the delivery of acute stroke therapies and secondary preventive measures and clinical outcomes over time in young adults with acute ischemic stroke. This study investigated whether advances in these treatments improved outcomes in this population.

Methods: Using a prospective multicenter stroke registry in Korea, young adults (aged 18-50 years) with acute ischemic stroke hospitalized between 2008 and 2019 were identified.

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