Publications by authors named "Ryo Ueda"

Article Synopsis
  • The study aimed to understand how rapid reading affects brain function, focusing on areas linked to language processing, reading comprehension, and memory using fMRI technology.
  • It involved 46 participants divided into nonrapid and rapid readers, matched by age, gender, and handedness, with advanced imaging techniques used to assess brain activity.
  • Results showed that rapid readers had lower neural activity in key language-related brain areas, indicating decreased language processing and comprehension abilities during quick reading tasks.
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  • This study explores the anatomical differences in the nasal cavity of patients with growth hormone-secreting pituitary tumors (PitNETs) causing acromegaly compared to those with non-functioning PitNETs.
  • Researchers used preoperative CT scans to evaluate these differences in 20 acromegaly patients and 22 control patients.
  • Findings indicate that certain anatomical measurements were significantly different in the acromegaly group, which may complicate surgical procedures, highlighting the need for careful planning during surgery.
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Background/aim: Many glioma patients struggle to return to work after surgery because of higher brain dysfunction. Although the right frontal lobe has historically been considered functionally silent, reports of performing awake surgery to evaluate higher brain functions in patients with tumors in this area have increased. We present two cases of patients who underwent awake surgery for malignant glioma in the right frontal lobe to preserve emotional recognition and facilitate an early return to work.

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  • Trigeminal schwannomas are rare benign tumors affecting the trigeminal nerve, often leading to trigeminal neuropathy, which is under-researched due to their rarity.
  • A study conducted on 86 surgical cases from 1975 to 2018 analyzed factors like age, tumor size, and surgical methods to assess their impact on postoperative trigeminal neuropathy.
  • Findings revealed that older age, smaller tumor size, middle and posterior tumor location, and complete tumor removal were significant risk factors for worsening sensory disturbances after surgery, suggesting the need for improved treatment strategies.
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Cerebrospinal fluid (CSF) leakage is a common complication associated with endoscopic endonasal skull-base surgery (EESBS). Postoperative mobilization-associated postural changes are considered to cause CSF leakage. However, no study has demonstrated a robust relationship between postural changes and CSF leakage.

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  • * Discontinuing immunosuppressants didn’t help her condition, but treatment with lenalidomide led to the disappearance of lymphoma cells and normalization of sIL2R levels, despite causing some pancytopenia (low blood cell counts).
  • * After treatment with lenalidomide, the woman achieved complete remission and showed no signs of ATL relapse after 13 months, indicating lenalidomide could be an effective treatment for relapsed
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The glymphatic system, an expansive cerebral waste-disposal network, harbors myriad enigmatic facets necessitating elucidation of their nexus with diverse pathologies. Murine investigations have revealed a relationship between the glymphatic system and affective disorders. This study aimed to illuminate the interplay between bipolar disorder and the glymphatic system.

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  • * The Vesical Imaging-Reporting and Data System (VI-RADS), created in 2018, enhances the preoperative evaluation of muscle-invasive bladder cancer (MIBC) by utilizing advanced multiparametric MRI techniques to effectively differentiate MIBC from non-muscle-invasive bladder cancer (NMIBC).
  • * The review underscores the importance of mpMRI in identifying variant UCs, while also addressing the need for precise preoperative assessments and exploring innovations like artificial intelligence to improve MRI diagnostics and reduce errors
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Purpose: The humanized antivascular endothelial growth factor (VEGF) antibody bevacizumab (Bev) is efficacious for the treatment of NF2-related schwannomatosis (NF2), previously known as neurofibromatosis type 2. This study evaluated the safety and efficacy of a VEGF receptor (VEGFR) vaccine containing VEGFR1 and VEGFR2 peptides in patients with NF2 with progressive schwannomas (jRCTs031180184).

Materials And Methods: VEGFR1 and VEGFR2 peptides were injected subcutaneously into infra-axillary and inguinal regions, once a week for 4 weeks and then once a month for 4 months.

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  • - This study focuses on creating a prediction model for amyloid-beta deposition in Alzheimer's disease using advanced MRI techniques and diverse patient data, including those with various cognitive disorders and healthy controls.
  • - The research utilized a data-driven algorithm analyzing structural MR images, cognitive test results, and apolipoprotein E status, achieving an impressive accuracy of 89.8% in detecting amyloid-beta positivity.
  • - The findings suggest that a specific gray matter volume pattern related to Alzheimer's significantly impacts prediction accuracy, highlighting the potential of MRI-based machine learning as a diagnostic tool for various neurological and psychiatric conditions.
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Introduction: Glioblastomas can manifest as multiple, simultaneous, noncontiguous lesions. We genetically analyzed multiple glioblastomas and discuss their etiological origins in this report.

Case Presentation: We present the case of a 47-year-old woman who presented with memory impairment and left partial paralysis.

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The behavior of adsorbate-induced surface transformation can be clearly understood given the mechanical aspects of such phenomenon are well described at the atomic level. In this study, we provide the atomic-level description on the formation of Cu clusters on the Cu(111) surface by performing set of molecular dynamics simulations driven by machine-learning force-field. The simulations at 450 K-550 K show clusters are formed within a hundred of ns when the Cu surface is exposed with CO.

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Background: Plasma biomarkers have emerged as promising screening tools for Alzheimer's disease (AD) because of their potential to detect amyloid β (Aβ) accumulation in the brain. One such candidate is the plasma Aβ42/40 ratio (Aβ42/40). Unlike previous research that used traditional immunoassay, recent studies that measured plasma Aβ42/40 using fully automated platforms reported promising results.

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Scientific advances have improved our understanding of the molecular pathological mechanisms underlying pituitary tumorigenesis, allowing us to analyze tumors in a more precise manner and to identify the tumors that have a greater risk of aggressive behavior at an earlier stage. Based on these molecular pathological findings, the classification of pituitary tumors has been revised over the last two decades to better describe their biological and clinical behavior and to identify prognostic markers of aggressiveness and poor prognosis. Understanding pituitary tumors at the molecular level has enabled increasingly targeted treatments with safety and efficacy validated in randomized trials.

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Objective: Endoscopic endonasal surgery (EES) for deep intracranial lesions has gained popularity following recent developments in endoscopic technology. The operability of invasive pituitary neuroendocrine tumors (PitNETs) depends on the anatomy of the nasal cavity and paranasal sinus. This study aimed to establish a simple volume reconstruction algorithm of the nasal cavity and paranasal sinus.

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Background: A combined transpetrosal approach (CTP) is often used for large lesions in the posterior cranial fossa (PCF). Although CTP provides a wide surgical corridor, it has complex and time-consuming bony work of mastoidectomy and cosmetic issues. Here, we describe a simple combined surgical technique to approach the supratentorial region, anterolateral surface of the brainstem, petroclival region, and foramen magnum by drilling only the petrous apex with a combination of retrosigmoid approach (RA).

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Article Synopsis
  • - The study assessed how combining amyloid and tau PET imaging affects diagnosis and treatment decisions in a memory clinic, focusing on cognitive normal, mild cognitive impairment (MCI), and dementia patients.
  • - Out of 126 participants, significant changes in diagnosis were seen, particularly in MCI patients (68%), and management changes occurred for 52% of MCI cases and 38.1% of dementia cases.
  • - Findings suggest that tau PET has a greater influence on management changes compared to amyloid PET, providing strong evidence for using these imaging techniques together in clinical settings.
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Aim: Parents have significant genetic and environmental influences, which are known as intergenerational effects, on the cognition, behavior, and brain of their offspring. These intergenerational effects are observed in patients with mood disorders, with a particularly strong association of depression between mothers and daughters. The main purpose of our study was to investigate female-specific intergenerational transmission patterns in the human brain among patients with depression and their never-depressed offspring.

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  • The study evaluated the effectiveness of the Vesicle Imaging-Reporting and Data System (VI-RADS) for diagnosing muscle-invasive bladder cancer (MIBC) in patients with both pure urothelial carcinoma (PUC) and variant histology urothelial carcinoma (VUC).
  • Results indicated that VI-RADS scores were significantly higher for VUC patients compared to PUC patients, yet when controlling for matched pairs, there was no significant difference in overall score distribution.
  • Overall, VI-RADS demonstrated strong diagnostic performance for MIBC in both types of bladder cancer, indicating its reliability and accuracy across different histological variants.
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Background: Alzheimer's disease (AD) is the most common cause of dementia worldwide. In AD, abnormal tau accumulates within neurons of the brain, facilitated by extracellular β-amyloid deposition, leading to neurodegeneration, and eventually, cognitive impairment. As this process is thought to be irreversible, early identification of abnormal tau in the brain is crucial for the development of new therapeutic interventions.

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Although endoscopic skull-base reconstruction protocols to reduce cerebrospinal fluid (CSF) leakage are reported, the most effective management strategies have not been determined. We describe the successful repair of a spontaneous CSF leak using a vascularized middle turbinate flap (MTF) via an endonasal endoscopic approach and also discuss the effective reconstruction with other available pedicled flaps. An 11-year-old girl had a 5-month history of intermittent CSF rhinorrhea.

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