Publications by authors named "Thomas Rossor"

Article Synopsis
  • The review discusses the link between neurological conditions and underlying cancers, focusing on genetic, environmental, and tumor-related factors that can lead to autoimmunity and paraneoplastic syndromes.
  • It covers the pathogenesis of specific paraneoplastic conditions in children, such as Opsoclonus myoclonus ataxia syndrome and NMDA receptor encephalitis, along with current treatment strategies.
  • The text highlights advancements in cancer therapies, particularly immune treatments, and examines their potential neurological side effects, emphasizing the need to balance risks and benefits.
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  • A study assessed children under 18 with antibodies to myelin oligodendrocyte glycoprotein (MOG-Ab), focusing on those with encephalitis who didn’t fit the criteria for acute disseminated encephalitis (ADEM), comparing them to those with ADEM.
  • Out of 235 MOG-Ab positive patients, 33 had encephalitis and 74 had ADEM, with common symptoms including headache, seizures, and fever; 24% had a normal initial brain MRI.
  • Findings indicated that children with encephalitis were generally older, more often admitted to intensive care, and had a delayed start of steroid treatment, suggesting MOG-Ab testing is essential for suspected encephalitis
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It is unknown if cognition is impaired before clinical onset of paediatric acquired demyelinating syndromes. We conducted a matched cohort study using prospectively collected educational data in multiple sclerosis (MS) and myelin oligodendrocyte glycoprotein antibody disease (MOGAD) patients (n = 60) and controls (pooled n = 449,553). Academic performance at ages 10-11 was impaired in MOGAD (-1.

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Narcolepsy with cataplexy and myasthenia gravis are both chronic neurologic conditions causing symptoms of muscle weakness, often affecting facial muscles, and have both been attributed to an immune-mediated etiology. We report an adolescent girl diagnosed with both conditions and discuss possible shared mechanisms and the diagnostic challenges presented by her case to inform and aid clinicians managing children and young people with these rare conditions.

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Article Synopsis
  • Lesion resolution is more common in children with myelin-oligodendrocyte glycoprotein antibody-associated disease (MOGAD) compared to those with multiple sclerosis (MS), with 83% of MOGAD patients showing at least one resolved lesion during follow-up, while MS patients rarely experience this.
  • In a study of 200 children (97 with MOGAD and 103 with MS), new symptomatic and asymptomatic lesions were significantly more prevalent in MS than in MOGAD, indicating different disease behaviors.
  • Early intervention with steroids and plasma exchange positively impacted lesion dynamics in MOGAD, highlighting the importance of timely treatment to reduce new lesions and enhance recovery potential.
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Immune-mediated encephalitis.

Dev Med Child Neurol

March 2024

A neurological deterioration in a child presents a significant worry to the family and often a diagnostic challenge to the clinician. A dysregulated immune response is implicated in a wide and growing spectrum of neurological conditions. In this review we consider the current paradigms in which immune-mediated encephalopathies are considered; the development of paediatric specific diagnostic criteria that facilitate early consideration and treatment of immune-mediated conditions and the limitations and potential developments in diagnostic testing.

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  • - Viral or bacterial infections in children can lead to autoimmune inflammatory reactions, particularly when the immune system mistakenly targets the body due to similarities in molecular structures between pathogens and the body's own tissues, resulting in conditions like post-infectious psychiatric syndromes related to Varicella Zoster Virus (VZV).
  • - A case study highlighted two children, aged 6 and 10, who developed neuro-psychiatric symptoms 3-6 weeks after VZV infection, showing symptoms like behavioral regression, insomnia, and agitation, with both responding positively to steroid treatment rather than other therapies.
  • - This research suggests that psychiatric issues linked to VZV infections, characterized by CNS inflammation post-infection and a response to immune modulation treatments
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  • Data from early in the pandemic showed that 0.62% of children hospitalized with COVID-19 experienced an acute arterial ischemic stroke (AIS), and researchers wanted to see if this percentage remained stable over time.
  • They surveyed 61 centers in 21 countries to gather data on the incidence of AIS in children with SARS-CoV-2 from June to December 2020, assessing the role of COVID-19 as a stroke risk factor.
  • Findings indicated that the risk of AIS in pediatric COVID-19 patients decreased to 0.32%, with SARS-CoV-2 identified as the main risk factor in a small number of cases, while elevated inflammatory markers were prevalent in those affected.
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Background And Objectives: Opsoclonus-myoclonus-ataxia syndrome (OMAS) is a rare disorder of the nervous system that classically presents with a combination of characteristic eye movement disorder and myoclonus, in addition to ataxia, irritability, and sleep disturbance. There is good evidence that OMAS is an immune-mediated condition that may be paraneoplastic in the context of neuroblastoma. This syndrome may be associated with long-term cognitive impairment, yet it remains unclear how this is influenced by disease course and treatment.

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Article Synopsis
  • - The study examined pediatric autoimmune limbic encephalitis (LE) in children under 18, analyzing clinical presentations, investigations, and management over a period from 2008 to 2021 across six UK centers.
  • - Out of 25 identified cases, all children experienced seizures, with significant hospital admissions and various treatments, including steroids and rituximab, though over half faced long-term issues like refractory seizures and memory impairment.
  • - The findings highlight the serious health impacts of autoimmune LE in children, indicating high morbidity and no significant treatment differences in long-term outcomes between those who received rituximab versus those who did not.
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Objectives: To compare the real-world effectiveness of newer disease-modifying therapies (DMTs) vs injectables in children with relapsing-remitting multiple sclerosis (RRMS).

Methods: In this retrospective, multicenter study, from the UK Childhood Inflammatory Demyelination Network, we identified children with RRMS receiving DMTs from January 2012 to December 2018. Clinical and paraclinical data were retrieved from the medical records.

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  • PIMS-TS is a serious immune disorder linked to COVID-19 in children, with a focus on neurologic symptoms noted in 12% of patients.
  • The study reviewed 75 cases, finding various neurologic issues such as altered consciousness, behavioral changes, and seizures, with some patients showing abnormalities in brain imaging.
  • By three months post-presentation, half of the children with neurologic symptoms had fully recovered, while higher systemic inflammatory markers were noted in those with neurologic involvement and those not fully recovered.
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  • A study was conducted to analyze children diagnosed with epilepsia partialis continua (EPC) at a pediatric neurology center from 2002 to 2019, focusing on their characteristics and the development of a diagnostic algorithm. !* -
  • Among the 54 children studied, the most common diagnoses included Rasmussen encephalitis (56%) and mitochondrial disorders (22.2%), with specific predictors identified for mitochondrial disorders, such as early EPC onset and developmental concerns. !* -
  • The research recommended brain MRI as the initial diagnostic tool and emphasized the importance of follow-up imaging for certain conditions, along with genetic testing for mitochondrial disorders, to improve diagnosis and treatment plans for affected children. !*
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Objective: To identify predictors of epilepsy and clinical relapses in children presenting with acute disseminated encephalomyelitis (ADEM).

Methods: Children presenting with ADEM between 2005 and 2017 and tested clinically for MOG-Ab were identified from three tertiary paediatric neurology centres in the United Kingdom. Patients were followed up for a median of 6 years (range, 1-16 years).

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Background: Maternal smoking, substance misuse in pregnancy and prone sleeping increase the risk of sudden infant death syndrome (SIDS). We examined the effect of maternal smoking, substance misuse and sleeping position on the newborn response to hypoxia.

Methods: Infants born between 36 and 42 weeks of gestational age underwent respiratory monitoring in the prone and supine sleeping position before and during a hypoxic challenge.

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BackgroundWe tested the hypotheses that caffeine therapy would increase the ventilatory response to hypercarbia in infants above the effect of maturation and those with a weaker ventilatory response to hypercarbia would be more likely to subsequently develop apnea that required treatment.MethodsInfants born at less than 34 weeks of gestation underwent a steady-state hypercarbic challenge using 0, 2, and 4% carbon dioxide soon after birth that was repeated at weekly intervals. The results of the initial study were compared between infants who did or did not subsequently develop apnea requiring treatment with caffeine.

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Aim: To determine whether anticoagulation therapy (ACT) in the treatment of neonatal cerebral sinovenous thrombosis (CSVT) improves outcomes, in the presence or absence of pre-existing intracerebral haemorrhage (ICH).

Method: We searched CENTRAL, MEDLINE, Embase, CINAHL, the Web of Science, and clinical trial databases. We considered data from retrospective and prospective cohort studies, case series, and randomized controlled studies evaluating outcomes of CSVT treated with anticoagulation or no anticoagulation.

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Studies of adult patients have demonstrated that weekend admissions compared with weekday admissions had a significantly higher hospital mortality rate. We have reviewed the literature to determine if the timing of admission, for example, weekend or weekday, influenced mortality and morbidity in children. Seventeen studies reported the effect of timing of admission on mortality, and only four studies demonstrated an increase in those admitted at the weekend.

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Article Synopsis
  • The study aimed to compare the effectiveness of pH probes and multichannel intraluminal impedance (MII) in detecting gastro-oesophageal reflux in infants and test the link between acid reflux and lower baseline impedance.
  • A prospective analysis of 42 infants suspected of having reflux showed that only 21% had abnormal results, with pH monitoring identifying more cases than MII.
  • The findings indicated that clinical suspicions of reflux were often wrong, and the negative correlation between acid reflux and baseline impedance suggests possible mucosal damage due to acid exposure in these infants.
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Aim: To review the demographics and clinical and paraclinical parameters of children with myelin oligodendrocyte glycoprotein (MOG) antibody-associated relapsing disease.

Method: In this UK-based, multicentre study, 31 children with MOG antibody-associated relapsing disease were studied retrospectively.

Results: Of the 31 children studied, 14 presented with acute disseminated encephalomyelitis (ADEM); they were younger (mean 4.

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Background: Gastro-oesophageal reflux (GOR) and apnoea are common in infants; whether there is a causal relationship is controversial.

Objectives: To determine whether there was a temporal relationship between GOR and apnoea, in particular, the frequency of obstructive apnoeas and if the frequency of GOR episodes correlated with apnoea frequency when maturity at testing was taken into account.

Methods: Polysomnography and pH/multichannel intraluminal impedance (MII) studies were performed.

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Type 1 narcolepsy (NT1) is a chronic primary disorder of hypersomnolence characterized by excessive daytime sleepiness, cataplexy, sleep paralysis, hypnagogic hallucinations and disrupted nocturnal sleep. NT1 is linked to hypothalamic hypocretin deficiency, strongly associated with Human Leukocyte Antigen (HLA) marker DQB1*06:02 and of probable autoimmune origin. NT1 is usually associated with increased rates of overweight and obesity, and sometimes with increases in overnight blood pressure and increased rates of hypoventilation with raised CO levels overnight.

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