Publications by authors named "Su Yoon"

Purpose: This study aimed to conduct a comprehensive genetic analysis of patients with Langerhans cell histiocytosis (LCH), focusing on the frequency of MAPK pathway mutations, detailed mutation profiles of MAPK pathway genes, and their correlation with clinical features and prognosis in Korean LCH patients.

Materials And Methods: We performed targeted next-generation sequencing, capable of capturing exons from 382 cancer-related genes, on genomic DNA extracted from formaldehyde-fixed and paraffin-embedded samples of 45 pathologically confirmed LCH patients.

Results: The majority of patients (91.

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Experimental models for exploring abnormal brain blood vessels, including ischemic stroke, are crucial in neuroscience; recently, significant attention has been paid to artificial tissues through tissue engineering. Nanofibers, although commonly used as tissue engineering scaffolds, undergo structural deformations easily, making it challenging to create uniform tissue, especially for the smallest-diameter ones such as perforating arteries. This study focused on the development of a platform capable of reconstructing structurally and functionally replicated perforating arteries.

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Purpose: The number of elderly patients with trauma is increasing; therefore, precise models are necessary to estimate the mortality risk of elderly patients with trauma for informed clinical decision-making. This study aimed to develop machine learning based predictive models that predict 30-day mortality in severely injured elderly patients with trauma and to compare the predictive performance of various machine learning models.

Methods: This study targeted patients aged ≥65 years with an Injury Severity Score of ≥15 who visited the regional trauma center at Chungbuk National University Hospital between 2016 and 2022.

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Article Synopsis
  • Supratentorial and infratentorial epidural hematoma (SIEDH) is a rare but serious complication that can occur after a traumatic brain injury.
  • Current literature on SIEDH is limited, with only a handful of small studies available.
  • The report discusses three cases treated at the authors' institution, highlighting the importance of quick diagnosis and various surgical methods used for effective management.
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  • This study analyzed trauma patients at a single center in Korea, comparing characteristics and outcomes across different age groups (18-64, 65-79, and 80+).
  • The results showed distinct injury mechanisms: traffic accidents were most common in younger patients, while older patients primarily sustained injuries from slipping.
  • Factors influencing mortality included age, injury severity, and specific treatment interventions, emphasizing the need for tailored approaches to trauma care for elderly patients due to their higher mortality rates.
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  • The study aimed to validate various chest trauma scoring systems for classifying and treating polytrauma patients by analyzing data from 1,038 individuals.
  • It found that complications were more common in older patients, particularly those with head trauma, as indicated by poorer Glasgow Coma Scale scores and more severe rib fractures.
  • The Thoracic Trauma Severity Score (TTSS) was the most predictive scoring system, but overall, existing chest trauma scoring systems, including TTSS, are not suitable for clinical use in polytrauma cases, necessitating further revisions.
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Background: Delayed hemothorax (dHTX) can occur unexpectedly, even in patients who initially present without signs of hemothorax (HTX), potentially leading to death. We aimed to develop a predictive model for dHTX requiring intervention, specifically targeting those with no or occult HTX.

Methods: This retrospective study was conducted at a level 1 trauma center.

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Compensation is a key component of career satisfaction and professional growth. A new compensation model was developed to provide a framework for career growth and a compensation ladder for medical physicists with clinical responsibilities in an academic radiation oncology department. The goals for the new model were: (1) create a market competitive plan to support recruitment and retention of top physics talent, (2) incentivize clinical effort, innovation, citizenship/professional service, and academic achievement, (3) provide compensation growth opportunities separate from medical school promotions, and (4) create consistent, transparent, and fair metrics applicable to all clinical physicists in the department.

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Background: This study aimed to validate the Geriatric Trauma Outcome Score (GTOS) for predicting mortality associated with trauma in older Korean adults and compare the GTOS with the Trauma and Injury Severity Score (TRISS).

Methods: This study included patients aged ≥65 years who visited the Chungbuk National University Hospital Regional Trauma Center between January 2016 and December 2022. We used receiver operating characteristic curves and calibration plots to assess the discrimination and calibration of the scoring systems.

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Article Synopsis
  • - Histiocytic neoplasms are rare diseases characterized by abnormal growths of macrophages, dendritic cells, and monocytes, with specific types such as Langerhans cell histiocytosis (LCH) and Erdheim-Chester disease (ECD), each having different clinical outcomes.
  • - Genetic studies indicate that these neoplasms often involve mutations in the MAPK pathway, particularly in genes like BRAF and MAP2K1, suggesting they have a clonal nature.
  • - Advances in targeted therapies, including BRAF and MEK inhibitors, offer new treatment options, but challenges such as relapse and side effects highlight the need for further research to improve management and patient outcomes.
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  • - The study investigated the effectiveness of regdanvimab in reducing mortality among COVID-19 patients with end-stage renal disease undergoing hemodialysis, comparing those treated with the drug to those who were not.
  • - Among the 230 patients studied, the group receiving regdanvimab had a significantly lower in-hospital mortality rate (13.0%) compared to the non-regdanvimab group (32.0%).
  • - Results suggested that regdanvimab could be a beneficial treatment option for these patients, especially considering their high risk of severe infection and mortality.
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Traumatic portal vein injury is rare, but the associated mortality rate ranges from 50% to 70%. The management of this injury is difficult and remains controversial. In this case report, we describe the successful endovascular treatment of an obstruction that developed following the surgical repair of a traumatic portal vein injury.

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Flail chest is a severe injury to the chest wall and is related to adverse outcomes. A flail chest is classified as the physiologic, paradoxical motion of a chest wall or flail segment of rib fracture (RFX). We hypothesized that patients with paradoxical chest wall movement would present different clinical features from patients with a flail segment.

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  • The study analyzed data on hematopoietic stem cell transplantation (HSCT) in Korean children and adolescents with cancer from 2009 to 2019, revealing a declining number of patients but consistent transplant rates.
  • In 2019, only 221 HSCTs were performed, down from an average of 276, with most transplants now using peripheral blood stem cells instead of bone marrow.
  • The overall 5-year survival rate post-transplant is 85.1%, indicating improved outcomes for more recent HSCT patients, suggesting advancements in the procedure.
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The direct consequences of chest trauma may cause adverse outcomes. Therefore, the early detection of high-risk patients and appropriate interventions can improve patient outcomes. This study aimed to investigate the risk factor for overall pulmonary complications in patients with blunt traumatic rib fractures.

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Background: Post-traumatic blunt pericardial injury is a rare condition with only a few reported cases which were generally diagnosed during initial examinations upon admission. However, pericardial injuries not bad enough to dislocate the heart may only cause intermittent electrocardiogram (ECG) changes or be asymptomatic.

Case Summary: In this case, we report a blunt pericardial injury undetected on preoperative transthoracic echocardiography and chest computed tomography.

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Background: A cardiac resting phase is used when performing free-breathing cardiac magnetic resonance examinations.

Purpose: The purpose of this study was to test a cardiac resting phase detection system based on neural networks in clinical practice.

Material And Methods: Four chamber-view cine images were obtained from 32 patients and analyzed.

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Introduction: Intestinal obstruction associated with traumatic vertebral fracture is extremely rare. We report a case of obstructive small bowel injury caused by entrapment of the small intestine at the fracture site of the 5th lumbar vertebra due to trauma.

Case Presentation: A 55-year-old man fell from a height of 4 m and visited the emergency room of a local hospital with complain of back pain.

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Background: Aortic intramural hematoma (IMH) associated with aortic branch tear and intramurally located pseudoaneurysm after blunt trauma has not been reported. Here, we report a case of progressive type A aortic IMH associated with a pseudoaneurysm arising from the injured proximal renal artery after blunt trauma.

Case Summary: During logging operations, a 66-year-old man experienced blunt force trauma after being injured by a fallen tree.

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A residue-free transfer method for graphene is proposed in this study, especially for the fabrication of suspended structures. Using perforated polymer templates, graphene can be precisely transferred onto the specific position in the perforated target SiO/Si substrates without the need for polymer removal and the subsequent thermal annealing process. The surface of the transferred graphene by the proposed method was analyzed and corroborated via Raman spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy.

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Objective: We aimed to identify the risk factors for ventilator-associated pneumonia in patients admitted to critical care after a torso injury.

Methods: We retrospectively evaluated 178 patients with torso injury aged >15 years who were intubated in the emergency room and placed on a mechanical ventilator after intensive care unit (ICU) admission, survived for >48 hours, had thoracic and/or abdominal injuries, and had no end-stage renal disease. We compared clinico-laboratory variables between ventilator-associated pneumonia (n = 54, 30.

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Acute kidney injury (AKI) is common in trauma patients and associated with poor outcomes. Identifying AKI risk factors in trauma patients is important for risk stratification and provision of optimal intensive care unit (ICU) treatment. This study identified AKI risk factors in patients admitted to critical care after sustaining torso injuries.

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Background: To determine the correct size of endotracheal tubes (ETTs) for endotracheal intubation of pediatric patients, new methods have been investigated. Although the three-dimensional (3D) printing technology has been successful in the field of surgery, there are not many studies in the field of anesthesia. The purpose of this study was to evaluate the accuracy of a 3D airway model for prediction of the correct ETT size, and compare the results with a conventional age-based formula in pediatric patients.

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Rationale: Marfan syndrome (MFS) has been defined as a genetic disorder that affects various systems such as the musculoskeletal, orbital, and cardiovascular systems. Neonatal MFS is considered rare and the most severe form of MFS is characterized by rapidly progressive atrioventricular valve dysfunction, often leading to death during early childhood due to congestive heart failure.

Patient Concerns: A newborn with neonatal MFS and severe cardiac involvement.

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