30,763 results match your criteria: "University of Ulsan.[Affiliation]"

Use of the Da Vinci SP surgical system in robot-assisted nipple-sparing mastectomy: a single-center, retrospective study.

Sci Rep

January 2025

Division of Breast Surgery, Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-Gu, Seoul, 05505, Republic of Korea.

We investigated the safety and performance of the Da Vinci SP single-port robot (SP robot) in nipple-sparing mastectomy (NSM) with immediate reconstruction. Medical records of 60 women aged ≥ 19 years who had undergone SP robot-assisted unilateral or bilateral NSM with immediate reconstruction between October 2020 and August 2021 were retrospectively analyzed. Stage I (31, 47.

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Prognosis of patients with breast cancer who underwent breast-conserving surgery using a 3D-printed surgical guide after neoadjuvant chemotherapy.

Sci Rep

January 2025

Division of Breast Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.

In breast-conserving surgery (BCS), clear resection margins are crucial to prevent recurrence. Accurate imaging is vital for precise BCS, with MRI being the most accurate. However, MRI has limitations in identifying the exact extent of breast cancer in patients who have undergone neoadjuvant chemotherapy (NACT).

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Serotonin transporter (SERT) availability was assessed using 2 tracers, [C],-dimethyl-2-(2-amino-4-cyanophenylthio)benzylamine ([C]DASB) and [C],-dimethyl-2-(2-amino-4-fluoromethylphenylthio)benzylamine) ([C]MADAM), in independent cohorts of patients and controls. This study aimed to independently confirm whether SERT remains intact in nondepressed individuals with early-stage Parkinson disease (PD), because the use of diverse methodologies could potentially yield disparate results. Seventeen PD patients (5 women and 12 men; age, 64 ± 7 y; Unified Parkinson's Disease Rating Scale motor score, 23 ± 5; Beck Depression Inventory score, 5 ± 4) and 20 age- and sex-matched healthy controls underwent [C]MADAM PET at Karolinska Institutet.

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Seasonal effect of PM exposure in patients with COPD: a multicentre panel study.

Environ Sci Process Impacts

January 2025

Department of Pulmonary and Critical Care Medicine, Clinical Research Center for Chronic Obstructive Airway Diseases, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-Gil, Songpa-gu, Seoul 05505, South Korea.

: Exposure to particulate matter <2.5 μm (PM) is linked to chronic obstructive pulmonary disease (COPD), but most studies lack individual PM measurements. Seasonal variation and their impact on clinical outcomes remain understudied.

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It remains unclear why unilateral proximal carotid artery occlusion (UCAO) causes benign oligemia in mice, yet leads to various outcomes (asymptomatic-to-death) in humans. We hypothesized that inhibition of nitric oxide synthase (NOS) both transforms UCAO-mediated oligemia into full infarction and expands pre-existing infarction. Using 900 mice, we i) investigated stroke-related effects of UCAO with/without intraperitoneal administration of the NOS inhibitor (NOSi) N-nitro-L-arginine methyl ester (L-NAME, 400 mg/kg); ii) examined the rescue effect of the NO-donor, molsidomine (200 mg/kg at 30 minutes); and iii) tested the impact of antiplatelet medications.

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Background And Objective: Patients receiving immune checkpoint blockade (ICB) therapy may experience periods of prolonged disease control without a need for systemic therapy. Treatment-free survival (TFS) is an important measure for this period, but no data are available for patients with metastatic renal cell carcinoma (mRCC) starting first-line agents. Our aim was to analyze TFS outcomes for patients with mRCC starting first-line therapy.

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Chimeric anterolateral thigh flap for reconstruction of complex defects in oral cancer: a report of three cases.

J Korean Assoc Oral Maxillofac Surg

December 2024

Department of Oral and Maxillofacial Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.

It is crucial to reconstruct extensive soft tissue defects following oral cancer resection to restore both function and aesthetics. Single anterolateral thigh flaps may not suffice for large defects. This report highlights the use of chimeric flaps, which feature multiple paddles with individual perforators, to reconstruct large intraoral and extraoral defects, adapting to wide defects, and covering areas with extensive tissue damage.

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Screening tests for specific immunoglobulin E (sIgE) to food allergens, such as the multiple allergen simultaneous test (MAST), are widely used in patients with suspected food allergies in South Korea. We evaluated whether MAST could effectively screen wheat-dependent exercise-induced anaphylaxis (WDEIA) and α-gal syndrome (AGS). We retrospectively reviewed patients with WDEIA and AGS diagnosed with unequivocal history and positive sIgE results for omega-5 gliadin and α-gal using ImmunoCAP, respectively.

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Purpose: Pediatric papillary thyroid cancer (PTC) is recommended to perform aggressive surgery to reduce the risk of recurrence. This study was designed to evaluate the concurrent association between multifocality, bilaterality, and the risk of recurrence in pediatric PTC.

Materials And Methods: This retrospective cohort study included pediatric patients (age <19 years) who underwent total thyroidectomy for PTC between 1996 and 2014 in a single tertiary center.

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Prognostic Value of Retinoblastoma in Small Intestinal Adenocarcinoma: A Multicenter Retrospective Study.

J Korean Med Sci

December 2024

Department of Pathology and Translational Genomics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

Background: The retinoblastoma (RB) protein which is encoded by gene selectively provides a cell type-specific function in malignancies. In colorectal carcinoma, RB has been highly expressed and related cyclin/cyclin-dependent kinase 4/6 inhibitors have shown improved therapeutic effects in some patients. However, little is known about RB in small intestinal adenocarcinoma (SIAC).

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Article Synopsis
  • Fascioliasis is a disease mainly found in livestock but has seen an increase in human cases in Korea, linked to a green vegetable juice delivery service.
  • Patients diagnosed with fascioliasis often presented with specific symptoms like eosinophilia and were treated with triclabendazole, showing varying recovery patterns in liver abscesses over time.
  • MRI findings indicated that late-diagnosed patients had a higher incidence of bile duct issues, while antibody levels and eosinophil counts significantly declined after treatment, suggesting the need for ongoing monitoring.
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Objective: To assess whether CT style conversion between different CT vendors using a routable generative adversarial network (RouteGAN) could minimize variation in ILD quantification, resulting in improved functional correlation of quantitative CT (QCT) measures.

Methods: Patients with idiopathic pulmonary fibrosis (IPF) who underwent unenhanced chest CTs with vendor A and a pulmonary function test (PFT) were retrospectively evaluated. As deep-learning based ILD quantification software was mainly developed using vendor B CT, style-converted images from vendor A to B style were generated using RouteGAN.

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Lenvatinib plus pembrolizumab significantly improved efficacy versus sunitinib in treatment of advanced renal cell carcinoma (aRCC) in the phase 3 CLEAR study. We report results of an exploratory post hoc analysis of tumor response data based on baseline metastatic characteristics of patients who received lenvatinib plus pembrolizumab versus sunitinib, at the final overall survival analysis time point of CLEAR (cutoff: July 31, 2022). Treatment-naïve adults with aRCC were randomized to: lenvatinib (20 mg PO QD in 21-day cycles) plus pembrolizumab (n = 355; 200 mg IV Q3W); lenvatinib plus everolimus (not reported here); or sunitinib (n = 357; 50 mg PO QD; 4 weeks on/2 weeks off).

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Impact of Routine Follow-Ups After Curative Gastrectomy in Elderly Patients with Early Gastric Cancer.

Ann Surg Oncol

December 2024

Department of Clinical Epidemiology and Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.

Introduction: Elderly patients with early gastric cancer exhibit a relatively shorter life expectancy and lower recurrence risk, prompting consideration of whether the regular follow-up strategy should apply to this demographic. This study was designed to determine the effect of routine postoperative follow-up on the elderly patients, specifically those pathologically diagnosed with stage I gastric cancer.

Methods And Materials: This retrospective analysis was conducted at a single tertiary center and enrolled patients aged ≥ 75 years who underwent curative gastrectomy for stage I gastric cancer between January of 2007 and December of 2016.

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Body mass index (BMI) is associated with chronic obstructive pulmonary disease (COPD) risk. We investigated the association between BMI and the risk of COPD among young individuals. Using the Korean National Health Information Database, we screened individuals aged 20-39 years who participated in the national health examination between 2009 and 2012.

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Differences in spatiotemporal dynamics for processing specific semantic categories: An EEG study.

Sci Rep

December 2024

Department of Electrical, Electronic, and Computer Engineering, University of Ulsan, Ulsan, Republic of Korea.

Semantic processing is an essential mechanism in human language comprehension and has profound implications for speech brain-computer interface technologies. Despite recent advances in brain imaging techniques and data analysis algorithms, the mechanisms underlying human brain semantic representations remain a topic of debate, specifically whether this occurs through the activation of selectively separated cortical regions or via a network of distributed and overlapping regions. This study investigates spatiotemporal neural representation during the perception of semantic words related to faces, numbers, and animals using electroencephalography.

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CRP deposition in human abdominal aortic aneurysm is associated with transcriptome alterations toward aneurysmal pathogenesis: insights from spatial whole transcriptomic analysis.

Front Immunol

December 2024

Department of Thoracic and Cardiovascular Surgery, Seoul Metropolitan Government-Seoul National University (SMG-SNU) Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea.

Background: We investigated the effects of C-reactive protein (CRP) deposition on the vessel walls in abdominal aortic aneurysm (AAA) by analyzing spatially resolved changes in gene expression. Our aim was to elucidate the pathways that contribute to disease progression.

Methods: AAA specimens from surgically resected formalin-fixed paraffin-embedded tissues were categorized into the AAA-high CRP [serum CRP ≥ 0.

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The improper handling and uncontrolled discharge of toxic organic dyes result in significant adverse effects on both human health and the environment. This study investigates the fabrication of SnO₂, yttrium and cobalt dual-doped SnO₂ (YCSn), chitosan-capped SnO₂ (CS*Sn), and chitosan-capped yttrium and cobalt dual-doped SnO₂ (CS*YCSn) nanoparticles using a one-step coprecipitation method for the photocatalytic degradation of methylene blue (MB) under visible light irradiation. Characterization techniques including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM), and ultraviolet-visible (UV-Vis) spectrophotometry confirm the successful synthesis of biodegradable CS*YCSn nanoparticles.

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CD8+ cell dominance in immune checkpoint inhibitor-induced colitis and its heterogeneity across endoscopic features.

Therap Adv Gastroenterol

December 2024

Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea.

Background: Immune checkpoint inhibitor (ICI)-induced colitis is a significant adverse event associated with ICI therapy, known to be linked to increased cytotoxic T-cell activity.

Objectives: To compare T-cell subsets based on the endoscopic features of ICI-induced colitis and to compare these findings with those of inflammatory bowel disease (IBD).

Design: Prospective cohort study.

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Background And Objectives: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a life-threatening inherited arrhythmogenic disorder. Recently, , the major CPVT-causative gene, was associated with neuropsychiatric manifestations. We aimed to analyze the clinical presentations, neuropsychiatric manifestations, and treatment outcomes of children with CPVT.

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Background And Objectives: Traditional manual percutaneous coronary intervention (PCI) exposes operators to significant radiation and physical stress. The recently developed Advanced Vascular Intervention Assist Robot (AVIAR) 2.0 system in South Korea aimed to overcome these issues by evaluating its safety and feasibility in a clinical setting.

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Guidelines suggest the Liver Imaging Reporting and Data System (LI-RADS) may not be applicable for some populations at risk for hepatocellular carcinoma (HCC). However, data assessing the association of HCC risk factors with LI-RADS major features are lacking. To evaluate whether the association between HCC risk factors and each CT/MRI LI-RADS major feature differs among individuals at-risk for HCC.

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Aims: The hepatic perivascular epithelioid cell tumour (PEComa), including angiomyolipoma, exhibits diverse morphology and clinical behaviour; however, its prognostic features remain undefined. This study aimed to investigate its histological features and prognostic factors.

Methods And Results: In total, 132 patients were included.

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Background: Conventional right hepatectomy typically involves resection of the right hemiliver, often including partial removal of the caudate lobe. However, recent advancements, particularly in indocyanine green (ICG) fluorescence imaging, have allowed for more accurate identification of anatomical boundaries between liver segments. In this context, we present a refined technique for real anatomical right hepatectomy that preserves the caudate lobe, offering enhanced surgical precision and several distinct advantages over traditional methods.

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