Publications by authors named "Tsugawa T"

An 11-year-old girl with quiescent ulcerative colitis had sustained elevation of liver enzymes. Although she had no clinical symptoms suggestive of Wilson's disease, such as Kayser-Fleischer rings, laboratory data showed decreased serum copper and ceruloplasmin levels and increased urinary copper excretion. Genetic testing showed pathogenic variants in allele 1: c.

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Bismuth oxide nanosheets were synthesized through the exfoliation of layered compounds without any organic exfoliation agents. The layered compound BiSrCaFeO, comprising Bi-O layers and Sr-Ca-Fe-O layers, was synthesized as the starting material. The Sr-Ca-Fe-O layers were selectively dissolved by shaking the compound in 0.

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Congenital syphilis (CS) is a mother-to-child infection caused by the bacterium Treponema pallidum, transmitted through the placenta. In Japan, the number of syphilis cases has recently increased, accompanied by an increase in CS cases. Thus, automated methods for serum antibodies with serial values, without a 2× dilution sequence, have been widely used.

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Background: In March 2024, children with pulmonary hypoplasia, airway stenosis, congenital esophageal atresia, inborn errors of metabolism, and neuromuscular diseases became eligible for palivizumab in Japan. Despite limited epidemiological data, expert consensus guided the recommendation for palivizumab use in these children to ensure its proper application.

Objectives: This article outlines the proper use of palivizumab for RSV infection in infants and children with the specified conditions, aiming to enhance understanding of the medical basis for its clinical guidance.

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Introduction: Recent studies have reported that essential tremor (ET) presents with not only motor symptoms but also cognitive dysfunction. However, detailed pathological mechanisms remain unclear. Here, we evaluate the characteristics of cognitive changes in older patients.

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Background: Because of a scant report, it is little known that thyroid storms can occur after trauma, even in adolescence. Significantly, this increases the risk of delaying diagnosis resulting in life-threatening.

Case Presentation: A 13-year-old girl was admitted to the emergency department after a traffic accident.

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Graphene oxide (GO) has been attracting intensive attention as a flexible barrier film, however, provides no barrier for proton transfer due to its out-of-plane proton conductivity (10 S cm) based on nanoscale defects with oxygen functional groups. In this study, it is reported that a pore-free GO (Pf-GO) membrane with controlled oxygen functional groups exhibits unexpected proton blocking behavior (10 S cm). Proton permeation tests conducted in aqueous solution demonstrate that proton permeation is below the detection limit, and lithium metal foils coated with the Pf-GO show higher chemical stability to water than those coated with previously reported GO.

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Area-selective deposition (ASD) based on self-aligned technology has emerged as a promising solution for resolving misalignment issues during ultrafine patterning processes. Despite its potential, the problems of area-selectivity losing beyond a certain thickness remain critical in ASD applications. This study reports a novel approach to sustain the area-selectivity of Ir films as the thickness increases.

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  • In the 2010s, new rotavirus strains led to global epidemics, prompting a study in Japan that analyzed 489 rotavirus-positive stool samples from 2014 to 2019 using next-generation sequencing.
  • Nine different rotavirus genotypes were identified, with the dominant strain changing each year; notable strains included G8P[8] and G1P[8] in the early years, and G9P[8] becoming prevalent in 2016 and 2019.
  • The study revealed that certain strains, particularly G1P[8]-E2, may have emerged from independent genetic reassortment events and exhibited distinct mutations in VP7 proteins, which could help the virus evade immune
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Human adenovirus (HAdV) infections present diverse clinical manifestations upon infecting individuals, with respiratory infections predominating in children. We surveyed pediatric hospitalizations due to respiratory HAdV infections across 18 hospitals in Hokkaido Prefecture, Japan, from July 2019 to March 2024, recording 473 admissions. While hospitalizations remained below five cases per week from July 2019 to September 2023, a notable surge occurred in late October 2023, with weekly admissions peaking at 15-20 cases from November to December.

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  • Historically, Wa-like strains of rotavirus have been major contributors to gastroenteritis, but since the 2010s, a rise in non-Wa-like strains has been observed, indicating a change in viral evolution.
  • Research on RVA strains from outbreaks in Sapporo, Japan, between 1981 and 1989 showed that these outbreaks were caused by Wa-like strains that resemble those from earlier decades, with analysis highlighting a divergence in pre-2010 strains versus a convergence in post-2010 strains.
  • Despite the introduction of rotavirus vaccines globally since 2006, the study found no strong evidence that these vaccines have influenced RVA evolution, suggesting that ongoing monitoring is necessary to fully understand the long-term effects of
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Respiratory syncytial virus (RSV) and rotavirus infections are long-standing infectious diseases that affect children worldwide. RSV and rotavirus were first discovered in clinical specimens in 1955 and 1973, respectively. From their discovery to the present day, significant progress has been made in understanding these two infections.

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Background: Cancer treatment for children is typically long-term and difficult, and the experience is unique for each child. When designing child-centred care, individuals' values and preferences are considered equally important as the clinical evidence; therefore, understanding children's thoughts and attitudes while they receive long-term treatment could offer valuable insights for better clinical practice.

Methods: We conducted long-term consecutive participatory observations and interviews with seven children, who were hospitalised and receiving cancer treatment for the first time.

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  • Group A rotaviruses (RVAs) can often infect specific animal species, but some strains, like those from felines, can infect humans, leading to gastrointestinal issues.
  • A study conducted in Japan analyzed rectal swabs from shelter cats and found strains G6P[9] and G3P[9], revealing that the G6P[9] strain circulated among cats with a high genetic similarity to a human strain associated with gastroenteritis.
  • The findings indicate that feline-origin G6 strains might be responsible for sporadic RVA infections in humans, highlighting the need for continued monitoring to prevent potential outbreaks.
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Magnetic resonance-guided focused ultrasound (MRgFUS) thalamotomy is an effective treatment for essential tremor (ET). However, its long-term outcomes and prognostic factors remain unclear. This study aimed to retrospectively investigate 38 patients with ET who underwent MRgFUS thalamotomy and were followed up for >2 years.

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Following the coronavirus disease 2019 (COVID-19) outbreak in February 2020, incidences of various infectious diseases decreased notably in Hokkaido Prefecture, Japan. However, Japan began gradually easing COVID-19 infection control measures in 2022. Here, we conducted a survey of children hospitalized with human metapneumovirus (hMPV), influenza A and B, and respiratory syncytial virus infections in 18 hospitals across Hokkaido Prefecture, Japan, spanning from July 2019 to June 2023.

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  • A study analyzed the effectiveness of specific probiotics available in Japan for treating acute infectious gastroenteritis in children under 18, focusing on randomized controlled trials.
  • The results indicated that children receiving probiotics experienced significantly shorter durations of diarrhea and hospital stays compared to those receiving a placebo, with the probiotics potentially helping children recover about a day earlier.
  • Despite these findings, the overall quality of evidence is low, suggesting that while probiotics might be beneficial, further research is needed for stronger conclusions.
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  • - A 10-year-old boy in Hokkaido, Japan, was diagnosed with severe infections caused by PVL-positive MRSA, leading to complications like osteomyelitis and pulmonary embolism.
  • - The treatment involved multiple antibiotics, including linezolid and vancomycin, and required surgical interventions due to additional abscesses and septic arthritis.
  • - Family members also showed signs of infection from the same MRSA strain, indicating its spread, and it was identified as a genetic variant of the USA300 clone, suggesting its emergence in Japan.
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Understanding the initial growth process during atomic layer deposition (ALD) is essential for various applications employing ultrathin films. This study investigated the initial growth of ALD Ir films using tricarbonyl-(1,2,3-η)-1,2,3-tri(-butyl)-cyclopropenyl-iridium and O. Isolated Ir nanoparticles were formed on the oxide surfaces during the initial growth stage, and their density and size were significantly influenced by the growth temperature and substrate surface, which strongly affected the precursor adsorption and surface diffusion of the adatoms.

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  • * Pregnant rats were exposed to conditions mimicking perinatal brain injury, and pups received either MSCs or a control vehicle; MSCs were found to increase brain volume and enhance neuron growth.
  • * The results suggest that MSC infusion could be a promising treatment for perinatal brain injury, as it improved motor skills, cognitive functions, and increased neuronal density in the affected brain areas.
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Introduction: Urachus carcinoma is a rare malignancy with an aggressive potential and a poor prognosis, and evidence is limited for its diagnosis and treatment.

Case Presentation: A 75-year-old man underwent fluorodeoxyglucose positron emission tomography/computed tomography for staging prostate cancer, and a mass (standardized uptake value max 9.5) was observed on the outside of the urinary bladder dome.

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Background: Many reports have reported a reduction in respiratory infectious diseases and infectious gastroenteritis immediately after the coronavirus disease 2019 (COVID-19) pandemic, but data continuing into 2022 are very limited. We sought to understand the current situation of various infectious diseases among children in Japan as of July 2022 to improve public health in the post-COVID-19 era.

Methods: We collected data on children hospitalized with infectious diseases in 18 hospitals in Japan from July 2019 to June 2022.

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