Publications by authors named "Kenneth Cheung"

Ultrasonic osteotomy devices (UODs) have emerged as precise bone-cutting instruments with soft tissue-sparing benefits; yet their impact on bone healing and adjacent neural tissue remains underexplored. This study aimed to investigate the effects of UODs versus conventional rotary high-speed burr (HSB) on bone healing and central nervous functions using mouse split calvarial bone defect models. Bilateral parietal bone defects were created in the skulls of mice using UOD (right) and HSB (left).

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Purpose: Neurofibromatosis type 1 (NF-1) is a genetic disease with many clinical manifestations, including early onset scoliosis (EOS). There has been increasing interest in the use of growing rod constructs in these patients. Our study seeks to understand the complication rates of these procedures in patients with NF-1.

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CD31 (PECAM-1) plays a critical role in T cell migration, whilst its immunoreceptor tyrosine inhibitory motifs (ITIMs), Y663 and Y686, are recognised for their roles in endothelial function, the precise mechanism in regulating immune cell remains elusive. Here, we demonstrate that CD31 is essential for Treg migration. Upon ITIM engagement, CD31 activates and interacts with the protein tyrosine phosphatase SHP2.

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Study DesignLiterature review.ObjectivesTo provide an overview of the complications associated with and management strategies for adult patients with osteoporosis requiring spinal reconstructive surgery. Emphasis will be placed on screening, diagnosis, and perioperative medical and surgical management of these patients.

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Background: Glioblastoma multiforme (GBM) is a lethal brain tumor. With the current gold standard chemotherapy treatment, temozolomide (TMZ), many patients do not survive beyond one year. While the urgency of researching novel treatments is understandable, the prohibitively high costs and the prolonged duration of research and clinical trials significantly delay the availability of medical advancements to the general public.

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Background: Improving patient safety and healthcare quality is necessary to advance value-based health care. Spine surgery is complex, entailing joint efforts between different disciplines. This scoping review aimed to map the research on establishing and implementing institution-based quality improvement (QI) initiatives in spine surgery.

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Purpose: Despite agreement on the importance of spinal curvature flexibility in surgical decision making, there is no consensus regarding optimal radiographic assessment and how this impacts care. We sought to further understand traction film indications and techniques.

Methods: A nine-question survey was administered to 194 members of the Pediatric Spine Study Group (PSSG).

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Purpose: To report all complications that occurred during the 2 to 5-year postoperative period, describe reoperations during this time period, and compare patients who did and did not have major, surgery-related complications and/or reoperations during this time period.

Methods: The Scoli-RISK-1 study enrolled 272 ASD patients undergoing surgery from 15 centers. Inclusion criteria were Cobb angle of > 80°, corrective osteotomy for congenital/revision deformity, and/or 3-column osteotomy.

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Fibrotic remodeling of nucleus pulposus (NP) leads to structural and mechanical anomalies of intervertebral discs that prone to degeneration, leading to low back pain incidence and disability. Emergence of fibroblastic cells in disc degeneration has been reported, yet their nature and origin remain elusive. In this study, we performed an integrative analysis of multiple single-cell RNA sequencing datasets to interrogate the cellular heterogeneity and fibroblast-like entities in degenerative human NP specimens.

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Background: Vertebral body tethering (VBT) has shown improvements in coronal and sagittal plane correction in adolescent idiopathic scoliosis (AIS) patients, but axial correction over time remains unexplored. Three-dimensional (3D) spine reconstruction was used to analyse correctional changes in all spinal planes post VBT surgery.

Case Description: AIS subjects who underwent thoracic VBT surgery with a minimum 2-year follow-up were assessed.

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Artificial sweeteners, as low-calorie sugar substitutes, have attracted much attention in recent years, especially in terms of their potential health effects. Although they add almost no calories, studies have shown that artificial sweeteners may affect metabolism by stimulating insulin secretion and changing the intestinal microbiota, increasing the risk of metabolic syndrome and type 2 diabetes. Breast cancer, as the most common cancer in the world, is related to multiple factors such as genetics and hormone levels.

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Pancreatic cancer is one of the most lethal cancers, with a 5-year overall survival rate of less than 10%. Despite the development of novel therapies in recent decades, current chemotherapeutic strategies offer limited clinical benefits due to the high heterogeneity and desmoplastic tumor microenvironment (TME) of pancreatic cancer as well as inefficient drug penetration. Antibody- and nucleic acid-based targeting therapies have emerged as strong contenders in pancreatic cancer drug discovery.

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Establishing normative values and understanding how proprioception varies among body parts is crucial. However, the variability across individuals, especially adolescents, makes it difficult to establish norms. This prevents further investigation into classifying patients with abnormal proprioception.

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Study Objective: This study is to uncover the advantages of abdominal aortic balloon occlusion in the uterine curettage treatment for patients with cesarean scar pregnancy (CSP).

Methods: To retrospectively analyze the clinical data of eighty patients with CSP after treatment in our hospital from 01/10/2019 to 01/05/2021. The 80 patients were divided into 2 groups: 41 patients were treated with abdominal aortic balloon occlusion and the control group ( = 39) underwent Uterine artery embolization (UAE).

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Excessive fructose intake has been associated with the development and progression of pancreatic cancer. This study aimed to elucidate the relationship between fructose utilization and pancreatic cancer progression. Our findings revealed that pancreatic cancer cells have a high capacity to utilize fructose and are capable of converting glucose to fructose via the AKR1B1-mediated polyol pathway, in addition to uptake via the fructose transporter GLUT5.

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Preoperative spine flexibility plays a key role in the intraoperative treatment course of severe scoliosis. In this cohort study, we examined the effects of 5 day inpatient scoliosis-specific exercise (SSE) on the spinal flexibility of patients with adolescent idiopathic scoliosis before surgery. A total of 65 patients were analyzed.

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Age-related osteoporosis is a metabolic skeletal disorder caused by estrogen deficiency in postmenopausal women. Prolonged use of anti-osteoporotic drugs such as bisphosphonates and FDA-approved anti-resorptive selective estrogen receptor modulators (SERMs) has been associated with various clinical drawbacks. We recently discovered a low-molecular-weight biocompatible and osteoanabolic phytoprotein, called HKUOT-S2 protein (32 kDa), from Thunb that can accelerate bone defect healing.

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Background: The prognosis of surgically treated subjects with early onset scoliosis (EOS) into adulthood has been lacking. We aimed to investigate the patients' perspectives on satisfaction with surgical treatment.

Methodology: We included all surgical candidates with EOS who had undergone index spinal surgery for scoliosis correction between 2009 and 2013.

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Article Synopsis
  • The study examines six cases of perioperative spinal cord injury (SCI) that occurred during complex adult deformity surgeries, noting their causes, treatments, and outcomes.
  • Out of 272 patients from the Scoli-RISK-1 cohort study, 2.2% experienced SCI, with cases occurring both during and after surgery.
  • The findings highlight the importance of close postoperative monitoring and timely intervention to prevent lasting neurological damage.
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Synovitis is characterized by a distinctmetabolic profile featuring the accumulation of lactate, a byproduct of cellular metabolism within inflamed joints. This study reveals that the activation of the CD31 signal by lactate instigates a metabolic shift, specifically initiating endothelial cell autophagy. This adaptive process plays a pivotal role in fulfilling the augmented energy and biomolecule demands associated with the formation of new blood vessels in the synovium of Rheumatoid Arthritis (RA).

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Article Synopsis
  • The study investigates the impact of different lengthening intervals for the Magnetically Controlled Growing Rod (MCGR) in treating Early Onset Scoliosis (EOS) patients and assesses patient-perceived outcomes using the validated EOS 24-Item Questionnaire (EOSQ).
  • A cohort of 133 subjects, observed over an average of 3.5 years, was divided into high, medium, and low lengthening interval subgroups, with analysis revealing that the medium interval group had significantly better scores in fatigue, emotion, and parental impact domains.
  • Ultimately, results suggest that all lengthening intervals are well tolerated by patients and their families, showing no negative effects on overall health-related quality of life.
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Study Design: Retrospective, multicenter.

Objective: The aim of this study was to assess curve progression and occurrence of revision surgery following tether breakage after vertebral body tethering (VBT).

Summary Of Background Data: Tether breakage after VBT is common with rates up to 50% reported.

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Study DesignProspective multicenter database post-hoc analysis.ObjectivesOpioids are frequently prescribed for painful spinal conditions to provide pain relief and to allow for functional improvement, both before and after spine surgery. Amidst a current opioid epidemic, it is important for providers to understand the impact of opioid use and its relationship with patient-reported outcomes.

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