21,484 results match your criteria: "The Hospital For Sick Children[Affiliation]"

This Letter to the Editor comments on and aims to clarify details regarding the case, 26 cm fall caught on video causing subdural hemorrhages and extensive retinal hemorrhages in an 8-month-old infant. The findings in this case are rarely reported in accidental injury events and are, therefore, important to understand.

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Purpose: Arginase 1 (ARG1) deficiency manifests with hyperargininemia and progressive neurological impairment. Recent estimates of birth prevalence using allele frequencies of variants do not sufficiently distinguish benign from pathogenic variants. Additionally, ongoing discussions of reproductive carrier screening for diseases such as ARG1 creates a need for improved understanding of variant classification.

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Genetics Adviser: The development and usability testing of a new patient digital health application to support clinical genomic testing.

Genet Med Open

January 2024

Genomics Health Services Research Program, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada.

Purpose: Increasing demand for genomic testing coupled with genetics workforce shortages has placed unsustainable pressure on standard models of care. Digital tools can offer improved access, efficiency, and cost savings. We created a patient-facing digital health application to support genomic testing.

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repeat expansion creates the unstable folate-sensitive fragile site FRA9A.

NAR Mol Med

October 2024

Program of Genetics and Genome Biology, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, 686 Bay Street, Toronto, M5G 0A4, Canada.

The hyper-unstable Chr9p21 locus, harbouring the interferon gene cluster, oncogenes and , is linked to multiple diseases. (GGGGCC)n expansions (Exp) are associated with incompletely penetrant amyotrophic lateral sclerosis, frontotemporal dementia and autoimmune disorders. Exp patients display hyperactive cGAS-STING-linked interferon immune and DNA damage responses, but the source of immunostimulatory or damaged DNA is unknown.

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Impacts of the COVID-19 pandemic on access to sexual and reproductive health services for women and transgender people with disabilities in Canada: a qualitative study.

Sex Reprod Health Matters

December 2024

Associate Professor, Department of Health and Society, University of Toronto Scarborough, Toronto, ON, Canada; Associate Professor, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Adjunct Scientist, Women's College Hospital Research Institute, Toronto, ON, Canada.

The COVID-19 pandemic has had a detrimental impact on sexual and reproductive health (SRH) and rights globally. However, little is known about the experiences of people with disabilities accessing SRH services during the COVID-19 pandemic. In this community-engaged qualitative study, we examined COVID-related impacts on access to SRH services for people with disabilities.

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A Bayesian latent class approach to causal inference with longitudinal data.

Stat Methods Med Res

December 2024

Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.

Bayesian methods are becoming increasingly in demand in clinical and public health comparative effectiveness research. Limited literature has explored parametric Bayesian causal approaches to handle time-dependent treatment and time-dependent covariates. In this article, building on to the work on Bayesian g-computation, we propose a fully Bayesian causal approach, implemented using latent confounder classes which represent the patient's disease and health status.

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While mostly de novo truncating variants in SCAF4 were recently identified in 18 individuals with variable neurodevelopmental phenotypes, knowledge on the molecular and clinical spectrum is still limited. We assembled data on 50 novel individuals with SCAF4 variants ascertained via GeneMatcher and personal communication. With detailed evaluation of clinical data, in silico predictions and structural modeling, we further characterized the molecular and clinical spectrum of the autosomal dominant SCAF4-associated neurodevelopmental disorder.

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Article Synopsis
  • * Researchers analyzed data from 450 patients, finding that 310 were classified as ultra-low risk (ULR) based on their rapid clinical response and low MAP scores, leading to significantly better outcomes.
  • * Patients in the ULR group had higher response rates at day 28 and lower non-relapse mortality at six months, suggesting that careful monitoring can guide safer, more effective GVHD treatment strategies.
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BAY 81-8973 Demonstrates Long-Term Safety and Efficacy in Children With Severe Haemophilia A: Results From the LEOPOLD Kids Extension Study.

Eur J Haematol

December 2024

Sheba Medical Center, The Israeli National Hemophilia Center, The Amalia Biron Thrombosis Research Institute and The Sackler Medical School, Tel Aviv University, Tel-Hashomer, Israel.

Objectives: To report the long-term safety and efficacy of BAY 81-8973 in the LEOPOLD Kids extension phase.

Methods: Patients received BAY 81-8973 (25-50 IU/kg) at least twice weekly. The primary endpoint was safety, assessed in all patients who entered the extension phase (n = 82).

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Effects of gene dosage on cognitive ability: A function-based association study across brain and non-brain processes.

Cell Genom

December 2024

Centre Hospitalier Universitaire Sainte-Justine Research Center, Montreal, QC, Canada; Department of Pediatrics, Université de Montréal, Montreal, QC, Canada. Electronic address:

Copy-number variants (CNVs) that increase the risk for neurodevelopmental disorders also affect cognitive ability. However, such CNVs remain challenging to study due to their scarcity, limiting our understanding of gene-dosage-sensitive biological processes linked to cognitive ability. We performed a genome-wide association study (GWAS) in 258,292 individuals, which identified-for the first time-a duplication at 2q12.

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Purpose: Genomic sequencing (GS) is increasingly used to improve diagnoses and inform targeted therapies. GS can also be used to identify the 10% of cancer patients with an underlying hereditary cancer syndrome (HCS), who can benefit from surveillance and preventive surgery that reduce morbidity/mortality. However, the evidence on clinical utility of GS for HCS is limited: we aimed to fill this gap by assessing yield of all cancer results and associated recommendations for patients undergoing GS for HCS.

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Invited Commentary: Liver Masses in Children with Underlying Predispositions: The Need for Multidisciplinary Collaboration.

Radiographics

January 2025

From the Department of Diagnostic and Interventional Radiology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, Canada M5G 1X8 (C.R., G.B.C.); and Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada (C.R., G.B.C.).

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Neuroligin 1 Regulates Autistic-Like Repetitive Behavior through Modulating the Activity of Striatal D2 Receptor-Expressing Medium Spiny Neurons.

Adv Sci (Weinh)

December 2024

The Key Laboratory of Developmental Genes and Human Disease, The School of Life Science and Technology, Southeast University, 2 Sipailou Road, Nanjing, 210096, China.

Restricted and repetitive behavior (RRB) is a primary symptom of autism spectrum disorder (ASD), which poses a significant risk to individuals' health and is becoming increasingly prevalent. However, the specific cellular and neural circuit mechanisms underlying the generation of RRB remain unclear. In this study, it is reported that the absence of the ASD-related protein Neuroligin 1 (NLGN1) in dopamine receptor D2-expressing medium spiny neurons (D2-MSNs) in the dorsal striatum is associated with the duration and frequency of self-grooming and digging behaviors.

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Article Synopsis
  • Systemic lupus erythematosus (SLE) is a serious autoimmune disease that primarily affects younger patients and those of non-European descent, although the exact causes are still not fully understood.
  • Recent research highlights how both common and rare gene variants, along with environmental and epigenetic factors, influence how SLE manifests and its severity, with a notable impact on younger patients.
  • Understanding these genetic and epigenetic variations could lead to better diagnostic and treatment strategies tailored to individuals based on their specific risk factors and disease profiles.
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Article Synopsis
  • Advances in precision medicine have led to a need for expanded diagnostic testing on pediatric CNS tumor samples, emphasizing the pathologist's role in selecting the correct tests and integrating results into treatment planning.
  • Pediatric CNS tumors often differ in their molecular drivers and diagnostic approaches compared to adult tumors, particularly when tissue samples are scarce.
  • The review outlines the clinicopathological and molecular features of common pediatric CNS tumors, aiming to help pathologists navigate diagnostic challenges and improve the accuracy of their diagnoses.
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Mesencephalosynapsis and aqueductal stenosis.

J Neuropathol Exp Neurol

December 2024

Fetal Medicine Unit, Ontario Fetal Center, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada.

Mesencephalosynapsis is characterized by a failure of the dorsal brainstem colliculi to separate into distinct lateral masses (non-cleavage, a.k.a.

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Objective: We identified factors associated with computed tomographic (CT) imaging within 24 hours of emergency department (ED) presentation in hospitalized children with severe orbital infections.

Patients And Methods: A multicenter retrospective cohort study was conducted that included children aged 2 months to 18 years between 2009 and 2018 who were admitted to the hospital with severe orbital infections, including periorbital and orbital cellulitis. Multivariable modified Poisson regression was used to identify possible factors associated with receiving a CT scan within 24 hours of ED presentation.

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Treatments for RYR1-related disorders.

Cochrane Database Syst Rev

December 2024

Department of Paediatric Neurology, University of Cape Town, Cape Town, South Africa.

This is a protocol for a Cochrane Review (intervention). The objectives are as follows: Primary objective To analyse the benefits and harms of pharmacological or other interventions (e.g.

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A gene cadre orchestrates the normal development of sensory and non-sensory cells in the inner ear, segregating the cochlea with a distinct tonotopic sound frequency map, similar brain projection, and five vestibular end-organs. However, the role of genes driving the ear development is largely unknown. Here, we show double deletion of the Iroquois homeobox 3 and 5 transcription factors (Irx3/5 DKO) leads to the fusion of the saccule and the cochlear base.

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Article Synopsis
  • Neonatal hypoxic-ischemic encephalopathy is a severe brain condition in infants, often leading to death or developmental issues, and MRI is used for prognosis, but with high variability in predictions.
  • Researchers developed an automated method to analyze MRI data from 286 infants, incorporating anatomical templates and advanced measurements to enhance outcome predictions.
  • The study found that MRI-based analysis could predict neurodevelopmental outcomes more accurately than traditional demographic and lab data alone, indicating that machine learning can significantly improve prognosis for affected infants.
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Background: The aim of this study was to quantify mediators of neutrophilic inflammation within airway extracellular vesicles (EVs) of children treated for a cystic fibrosis (CF) pulmonary exacerbation (PEx).

Methods: EVs were isolated from stored sputum samples collected before and after antibiotic therapy for PEx between 2011 and 2013, and characterised by nanoparticle tracking analysis (NTA) and transmission electron microscopy (TEM). Western blot analysis of EV protein extracts was used for EV canonical protein markers CD63, CD9 and flotillin-1 (FLOT1), as well as neutrophil elastase (NE), myeloperoxidase (MPO) and interleukin-8.

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