Publications by authors named "Yoon J Choi"

This study investigated the effects of unilateral temporomandibular joint disorders (TMJDs), specifically disc displacement without reduction and osteoarthritis on one side of the temporomandibular joint (TMJ), on facial asymmetry in women, while the contralateral TMJ exhibits normal findings. Participants were retrospectively enrolled and divided into an affected group (n = 42 with unilateral TMJD) and a control group (n = 49 with bilateral healthy TMJs). The affected group was dagnosed with osteoarthritis on cone-bema computed tomograph and anterior disk displacement without reduction on magnetic resonance imaging.

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Radiofrequency ablation (RFA) is a minimally invasive treatment modality used as an alternative to surgery in patients with benign thyroid nodules, recurrent thyroid cancers (RTCs), and primary thyroid microcarcinomas. The Korean Society of Thyroid Radiology (KSThR) initially developed recommendations for the optimal use of RFA for thyroid tumors in 2009 and revised them in 2012 and 2017. As new meaningful evidence has accumulated since 2017 and in response to a growing global interest in the use of RFA for treating malignant thyroid lesions, the task force committee members of the KSThR decided to update the guidelines on the use of RFA for the management of RTCs based on a comprehensive analysis of current literature and expert consensus.

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Purpose: Platinum-based chemotherapy is the standard treatment for advanced urothelial carcinoma (aUC). Switch maintenance therapy after first-line (1L) treatment may delay disease progression. This study evaluated pemetrexed as switch maintenance therapy versus observation in aUC patients without disease progression after initial chemotherapy.

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Background And Objective: Computed tomography (CT) of the head and neck is crucial for diagnosing internal structures. The demand for substituting traditional CT with cone beam CT (CBCT) exists because of its cost-effectiveness and reduced radiation exposure. However, CBCT cannot accurately depict airway shapes owing to image noise.

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Objective: To assess craniofacial and upper airway growth in infants with Robin sequence (RS) during the 1 year of life when their severe upper airway obstruction was treated non-surgically with the Stanford orthodontic airway plate treatment program (SOAP).

Design: Retrospective longitudinal cohort study comparing SOAP-treated infants with RS (treatment group) with age-matched healthy controls (HC) using computed tomography (CT).

Setting: Single tertiary referral hospital.

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Controlled photooxidation-mediated disruption of collagens in the tumor microenvironment can reduce desmoplasia and enhance immune responsiveness. However, achieving effective light delivery to solid tumors, particularly those with dynamic volumetric changes like pancreatic ductal adenocarcinoma (PDAC), remains challenging and limits the repeated and sustained photoactivation of drugs. Here, 3D, shape-morphing, implantable photonic devices (IPDs) are introduced that enable tumor-specific and continuous light irradiation for effective metronomic photodynamic therapy (mPDT).

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Objective: We evaluated the pharmacokinetics, tissue concentrations, and toxicities of belotecan during rotational intraperitoneal pressurized aerosol chemotherapy (RIPAC) in pigs.

Methods: We sprayed belotecan in 10% and 30% of doses for intravenous chemotherapy in six pigs (cohort 1, n=3, 0.50 mg/m²; cohort 2, n=3, 1.

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Background: In this single-arm, multicenter, phase 2 trial, the authors evaluated the efficacy and safety of avelumab plus gemcitabine in patients with leiomyosarcoma (LMS) who failed on first-line chemotherapy.

Methods: Patients with advanced LMS received avelumab 10 mg/kg on days 1 and 15 (for up to 24 months) plus gemcitabine 1000 mg/m on days 1, 8, and 15 of a 28-day cycle until they developed disease progression or intolerable toxicity. The primary end point was the objective response rate (ORR).

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Purpose: This study aimed to propose a methodological approach for reducing the radiation dose in pediatric conebeam computed tomography (CBCT), focusing exclusively on balancing image quality with dose optimization.

Materials And Methods: The dose-area product (DAP) for exposure was reduced using copper-plate attenuation of an X-ray source. The thickness of copper (Cu) was increased from 0 to 2.

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Esophageal fibrosis can develop due to caustic or radiation injuries. Umbilical cord-derived mesenchymal stem cells (UC-MSCs) are known to mitigate fibrosis in various organs. However, the potential effects of UC-MSCs on human esophageal fibrosis remain underexplored.

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Article Synopsis
  • EGFR-variant non-small cell lung cancer (NSCLC) is prone to central nervous system (CNS) metastases, making new treatment options like lazertinib important for improving patient outcomes.
  • This study was a phase 2 trial in South Korea involving patients with NSCLC and existing brain metastases who had not responded to first or second-generation EGFR inhibitors, assessing lazertinib's effectiveness.
  • Results showed a 55% intracranial objective response rate (iORR) for patients, with higher responses in those with specific genetic markers, indicating that lazertinib could be a promising option for treating CNS metastases in these patients.
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  • * The article introduces a new method called top-down drug discovery (TD), which involves searching through a large database of fungi to find genetic locations that produce molecules targeting specific human proteins, like cyclin-dependent kinases (CDKs).
  • * Researchers successfully discovered two new molecules that inhibit CDKs and improved one of them to enhance its selectivity and effectiveness, showcasing the potential of TD for developing innovative medicines.
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Air pollution and heavy metal exposure are emerging public health concerns. Prenatal exposure to air pollutants and heavy metals has been implicated in the development of congenital heart disease (CHD). However, the relationship between exposure to airborne heavy metals and CHD has not yet been investigated.

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Optimal fluid management during major surgery is of considerable concern to anesthesiologists. Although crystalloids are the first choice for fluid management, the administration of large volumes of crystalloids is associated with poor postoperative outcomes. Albumin can be used for fluid management and may protect renal function.

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Background: Individuals with type 2 diabetes mellitus (T2DM) have increased colorectal cancer (CRC) risk, but it is unknown whether income dynamics are associated with CRC risk in these individuals. We examined whether persistent low- or high-income and income changes are associated with CRC risk in non-elderly adults with T2DM.

Methods: Using nationally representative data from the Korean Health Insurance Service database, 1,909,492 adults aged 30 to 64 years with T2DM and no history of cancer were included between 2009 and 2012 (median follow-up of 7.

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  • The esophageal epithelium has strong regenerative abilities due to active stem cells, but the mechanisms controlling these cells are not fully understood.
  • This study highlights the importance of YAP1 in esophageal stem cells, showing that inhibiting YAP1 affects organoid formation and alters gene expression related to cell maturation.
  • The findings suggest that targeting YAP1 could lead to new approaches for esophageal regenerative medicine by enhancing our understanding of stem cell regulation.
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  • This study investigates the genetic factors that may increase the risk of severe external apical root resorption (EARR) during orthodontic treatment in a Korean population using extreme phenotype analysis.
  • Researchers analyzed DNA from 77 patients who had two maxillary premolars extracted and classified them into groups based on varying levels of EARR observed through radiographs.
  • They discovered significant associations between severe EARR and specific genetic variants (SNPs) in several genes, potentially aiding in creating predictive tools for identifying patients at risk for severe root resorption during orthodontics.
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Objective: To assess the efficacy and safety of perioperative melatonin and melatonin agonists in preventing postoperative delirium (POD).

Methods: We conducted a systematic search for randomized controlled trials (RCTs) published through December 2022. The primary outcome was efficacy based on the incidence of POD (POD-I).

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Blood vessels permit the selective passage of molecules and immune cells between tissues and circulation. Uncontrolled inflammatory responses from an infection can increase vascular permeability and edema, which can occasionally lead to fatal organ failure. We identified mexenone as a vascular permeability blocker by testing 2,910 compounds in the Clinically Applied Compound Library using the lipopolysaccharide (LPS)-induced vascular permeability assay.

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Purpose: This study aimed to assess the correlation between glycemic status (prediabetes and type 2 diabetes mellitus) and the risk of gastric cancer according to menopausal status.

Methods: A total of 982,559 pre/peri-menopausal and 1445,419 postmenopausal women aged ≥ 40, who underwent the Korean national health screening in 2009, were included and followed up until 2018. Hazard ratio (HR) and 95% confidence interval (CI) were calculated for development of gastric cancers according to hyperglycemic status in both groups using Cox proportional hazards models.

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Article Synopsis
  • Paclitaxel is a second-line treatment for advanced gastric cancer (AGC), but there are currently no biomarkers to predict which patients will benefit from it.
  • This study analyzed data from 288 AGC patients treated with paclitaxel from 2017-2022 using various machine learning models to create a prediction system for patient outcomes.
  • The best-performing model, an artificial neural network with genetic embedding, showed improved predictive accuracy, helping to identify patients who might achieve better progression-free survival with paclitaxel therapy.
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  • This study investigates the effectiveness of electric massage chairs (EMC) in reducing chemotherapy-induced nausea and vomiting (CINV) in cancer patients, as these side effects can significantly impact their quality of life.* -
  • A randomized trial involved 59 solid cancer patients, who were treated in either a standard bed or an EMC during chemotherapy, with questionnaires assessing CINV and quality of life.* -
  • Results showed no significant difference in overall CINV scores between the two groups, but EMC may still be beneficial for specific high-risk subgroups, suggesting potential value in improving quality of life for those patients.*
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Article Synopsis
  • Smoking and alcohol consumption significantly increase the risk of early-onset gastric cancer (GC) in individuals under 50, as shown in a nationwide study of nearly 7 million participants in Korea.
  • The study found that current smokers had the highest risk, with adjusted hazard ratios indicating a marked increase in GC incidence compared to non-smokers and non-drinkers.
  • Further research is recommended to explore the differing impacts of these risk factors on GC incidence between men and women.
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