Publications by authors named "Taku Omata"

Febrile infection-related epilepsy syndrome (FIRES) is a type of new-onset refractory status epilepticus (NORSE) that occurs in previously healthy children. Conventional antiepileptic drugs (AEDs) often fail to control seizures, necessitating the use of high-dose anesthetics, which can lead to severe complications and poor outcomes. Perampanel has shown promise in the treatment of refractory epilepsy; however, its role in FIRES remains underexplored.

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  • Short-chain enoyl-CoA hydratase is an important enzyme that helps break down certain fats and amino acids, and not having enough of it can lead to Leigh syndrome, a serious condition.
  • A case was reported of a 6-month-old boy who showed symptoms like being sleepy and having trouble breathing, along with signs of severe ketosis, which means his body was producing too many ketones.
  • Tests on his brain showed problems, and special genetic tests revealed he had changes in his genes that led to the enzyme deficiency; a diet low in valine might help manage this condition.
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  • AESD is a prevalent encephalopathy syndrome among Japanese children, and this report presents a unique case where MRI did not show typical abnormalities, but ASL indicated hyperperfusion.
  • A 1-year-old boy experienced a consciousness disorder following prolonged seizures; initial brain MRI was normal, but ASL revealed hyperperfusion in specific brain areas later on.
  • The study concludes that ASL could be a more effective method than DWI for identifying lesions in children suspected of having AESD, highlighting its importance in diagnosis.
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  • Acute encephalopathy with biphasic seizures and late reduced diffusion (AESD) can be hard to tell apart from long-lasting febrile seizures, especially in kids.
  • A study looked at the effects of a special mix of vitamins and supplements, called a "mitochondrial cocktail," to see if it can help prevent AESD in children with prolonged seizures related to fever.
  • The results showed that kids who received the mitochondrial cocktail had a much lower chance of developing AESD compared to those who didn't, suggesting that giving this mix early could be helpful in preventing the condition.
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  • Infantile traumatic brain injury (TBI) with a biphasic clinical course, known as TBIRD, is a newly identified type of TBI in infants, but its underlying mechanisms and outcomes are still not fully understood.
  • A study involving ten patients aged 3-15 months compared MRS data of those diagnosed with TBIRD to those without, revealing significantly higher glutamine levels in TBIRD patients and decreased N-acetyl aspartate levels that correlated with worse neurological outcomes.
  • The findings suggest that elevated glutamine may indicate the development of TBIRD and that N-acetyl aspartate levels could help predict the prognosis for these patients.
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Background: Infantile traumatic brain injury (TBI) with a biphasic clinical course and late reduced diffusion (TBIRD) has been reported as a type of TBI. However, it remains uncertain which pediatric patients with TBI develop TBIRD.

Methods: Patients with TBI who were admitted to our hospital and underwent magnetic resonance imaging (MRI) between December 2006 and October 2022 were included in this study.

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Background: Mutations in the FBXO28 gene, which encodes FBXO28, one of the F-box protein family, may cause developmental and epileptic encephalopathy (DEE). FBXO28-related DEE is radiologically characterized by cerebral atrophy, delayed/abnormal myelination, and brain malformation; however, no neurochemical analyses have been reported.

Case Report: A female Japanese infant presented with severe psychomotor delay, epileptic spasms, and visual impairment.

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  • The study aimed to determine if SARS-CoV-2 infection leads to acute encephalopathy in children and to identify the prevalent syndromes and their outcomes among pediatric patients in Japan from January 2020 to May 2022.
  • A nationwide survey of the Japanese Society of Child Neurology found 31 eligible patients, with common diagnoses being biphasic seizures and cases linked to multisystem inflammatory syndrome in children (MIS-C).
  • Out of the 31 patients studied, 29% experienced severe outcomes or died, highlighting the seriousness of encephalopathy associated with severe COVID-19 symptoms.
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Background: Focal cerebral arteriopathy (FCA) is a common cause of childhood arterial ischemic stroke in previously healthy children. Although its mechanisms are poorly understood, recent studies have suggested inflammatory processes. Magnetic resonance vessel wall imaging (VWI) is a potential imaging biomarker of inflammation.

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  • Leukoencephalopathy with calcifications and cysts is a rare genetic disorder that leads to brain issues, including calcifications, white matter disease, and cysts, and its progression varies among patients.
  • A case study of a 3-month-old girl highlighted the disorder's rapid progression, marked by seizures and significant brain abnormalities detected through CT and MRI scans, ultimately leading to severe developmental delays by age 4.
  • The case underscores that conventional whole-exome sequencing might not identify all variants, suggesting that careful neuroimaging is critical for diagnosis and understanding the disease's clinical features.
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Primary cough headaches (PCHs) are mainly observed in people aged >40 years, but cough-induced headaches are potentially symptomatic in children. We report a case of a child diagnosed with PCH without an intracranial disease. A 7-year-old boy presented with cough due to pertussis and powerful cough-induced headaches.

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Objective: We evaluated potassium bromide's (KBr's) efficacy and tolerability for pediatric refractory epilepsy.

Methods: We retrospectively reviewed the records of 42 patients treated with KBr in our hospital between 2008 and 2016 (age: 4 months to 19 years; mean: 6.2 years).

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Background: Anti-NMDA-R receptor encephalitis occurs predominantly in younger women and is often comorbid with ovarian teratoma, a feature that is often absent in children. Here, we report our experience with two pediatric patients, in whom no tumors were present during treatment for encephalitis, but in whom ovarian teratomas developed without encephalitis relapse after treatment was completed.

Cases: Patient 1 was a 14-year-old girl who was diagnosed due to characteristic symptoms and anti-NMDA-R antibody.

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Alice in Wonderland syndrome (AIWS) is a rare condition in which patients report distorted size perception of objects and their own bodies. Although specific causes and pathology have not been elucidated, an association between AIWS and infection has been suggested. To our knowledge, mycoplasma-induced AIWS has not been examined.

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Objective: We evaluated the effectiveness of synthetic adrenocorticotropic hormone (ACTH) therapy without tapering in treating patients with West syndrome.

Methods: Forty-four patients with cryptogenic (n = 7) or symptomatic (n = 37) West syndrome were treated with synthetic ACTH therapy between 2003 and 2012. The synthetic ACTH dosage was 0.

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Purpose: We retrospectively evaluated the imaging spectrum of Pelizaeus-Merzbacher disease (PMD) in correlation with the clinical course and genetic abnormality.

Methods: We collected the magnetic resonance imaging (MRI) findings of 19 genetically proven PMD patients (all males, aged 0-29years old) using our integrated web-based MRI data collection system from 14 hospitals. The patterns of hypomyelination were determined mainly by the signals of the cerebrum, corticospinal tract, and brainstem on T2-weighted images (T2WI).

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A patient with an unusually mild form of Pelizaeus-Merzbacher disease was studied. Clinically, mild developmental delay with acquisition of assisted walking at 16months and mild spastic tetraplegia were evident, but no nystagmus, cerebellar, or extra-pyramidal signs were present. PLP1 mutation analysis revealed a nucleotide substitution adjacent to the acceptor site of intron 3, NM_000533.

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We studied the efficacy of drugs indicated for mitochondrial dysfunction in the treatment of 21 patients with acute encephalopathy with onset of febrile convulsive status epilepticus at our hospital from January 2006 to December 2014. Among them, 11 patients had been treated with a mitochondrial drug cocktail consisting of vitamin B1, vitamin C, biotin, vitamin E, coenzyme Q10, and l-carnitine (prescription group) and 10 patients were not treated with the cocktail (non-prescription group). We retrospectively reviewed age, trigger, clinical form, treatment start time, and sequelae.

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Enterovirus focal encephalitis is a rare clinical entity that is characterized by focal neurological signs including seizure, hemiparesis, hemichorea, and headache, which are mainly followed by rapid spontaneous improvement. We herein describe the case of a 9-month-old boy who developed Coxsackie virus B5 (CVB5) focal encephalitis with seizure clusters in the eruption stage of roseola infantum-like illness, which were followed by rapid improvement and benign outcome. Lumbar puncture indicated pleocytosis, and CVB5 infection in the cerebrospinal fluid was subsequently identified on genome sequencing and virus isolation.

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Purpose: Cockayne syndrome (CS) is a rare, autosomal-recessive disorder characterized by microcephaly, impaired postnatal growth, and premature pathological aging. It has historically been considered a DNA repair disorder; fibroblasts from classic patients often exhibit impaired transcription-coupled nucleotide excision repair. Previous studies have largely been restricted to case reports and small series, and no guidelines for care have been established.

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Objective: Myasthenia gravis (MG) is a T-cell dependent and antibody mediated autoimmune disease. Recent studies of adult patients and animal models have shown that regulatory T cells (Tregs) play an important role in the pathogenesis of MG, but little is known about MG in children. This study evaluated the role of peripheral blood Tregs in childhood ocular MG and assessed if Tregs could be an index for estimating immunological status.

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Cockayne syndrome (CS) is a rare hereditary disease, characterized by profound postnatal brain and somatic growth failure and by the degeneration of multiple tissues resulting in cachexia, dementia, and premature aging. This syndrome is often associated with renal dysfunction, which usually correlates with the patient's prognosis. In the present study, we evaluated the longitudinal changes in serum creatinine and serum cystatin C levels in three patients with CS to examine whether these markers can help detect renal disorders at the earlier stages.

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Acute disseminated encephalomyelitis has an acute onset followed by improvement over several weeks. However, some cases require more time for a definitive diagnosis after protracted psychiatric or nonspecific symptoms. The authors investigated the time from onset to definitive diagnosis, subsequent course of treatment, and outcomes in 7 children with acute disseminated encephalomyelitis treated at the authors' hospital.

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