Publications by authors named "Tatsuya Aso"

Article Synopsis
  • This study examined patients with subcortical hemorrhage to differentiate between those with cerebral amyloid angiopathy (CAA) and those with non-CAA (hypertensive) via histological diagnosis.
  • Out of 100 analyzed cases, the CAA group was notably older and had lower blood pressure but larger hematomas compared to the non-CAA group, with similar outcomes post-surgery.
  • While surgery for CAA-related hemorrhages is typically safe, factors like age over 80, intraventricular hemorrhage complications, large hematoma size, and pre-existing dementia were linked to increased mortality risks.
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infectious endocarditis has a high mortality, major causes of death being cardiac failure, systemic embolism, and sepsis. Pseudoaneurysms, a rare complication of this infection, are not invariably fatal with appropriate treatment. A previously healthy 32-year-old man was found to have multiple cerebral infarctions, and infectious endocarditis with mitral valve vegetation was diagnosed by echocardiography.

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Background: The recent improvement of peroral cholangioscopy (POCS) maneuverability has enabled the precise, targeted biopsy of bile duct lesions under direct cholangioscopic vision. However, as only small-cup biopsy forceps can pass through the scope channel, the resulting small sample size may limit the pathological diagnosis of biopsy specimens. This study compared the diagnostic abilities of POCS-guided biopsy and conventional fluoroscopy-guided biopsy for bile duct cancer.

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Myxoid leiomyosarcoma (MLS) is a rare variant of leiomyosarcoma, with most cases occurring in the uterus. A case of MLS arising in the periosteal region of the tibia, mimicking extraskeletal myxoid chondrosarcoma (EMC), is described. The evaluation included histological and cytological comparison with EMC.

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Background: Diffuse midline glioma H3 K27M-mutant is a distinct subtype of glial tumors newly introduced in the revised fourth edition of the World Health Organization . They are aggressive pediatric tumors with a poor prognosis but have also been reported in adults.

Observations: The authors present the case of a man in his 60s who presented with rotatory vertigo, taste disorder, and right facial paralysis.

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Objective: A sheet material is widely used to repair pleural defects due to its excellent pressure resistance. We examined the long-term effects of sheet materials using an animal pleural defect model.

Methods: Beagles were used for this study.

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Objective: The purpose of this study was to test the hypothesis that apical opacities on computed tomography (CT) are related to occurrence of primary spontaneous pneumothorax (PSP) in young male patients.

Methods: We compared the frequency of apical opacities on thin-section CT between 70 male patients with PSP (PSP group) and 74 male patients without a history of PSP (non-PSP group). We also evaluated histopathologic findings of 39 specimens from 37 surgical cases in the PSP group.

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Aims: Urothelial carcinoma (UC) is a globally common cancer. miR-21 appears to be important in the tumorigenesis of almost all types of human cancer. However, its precise localization and significance in UC have yet to be clarified.

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Background/aim: Gastric cancer is a common cancer worldwide. Chromatin remodeling complexes have emerged as tumor suppressors and include AT-rich interaction domain-containing proteins (ARIDs) 1A, 1B, and 2. We examined their expression and clarified their roles in gastric carcinogenesis.

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Various C2-naphthylethynylated 2'-deoxyadenosines were synthesized as environmentally sensitive fluorescent (ESF) nucleosides and their photophysical properties were examined. Among the ESF nucleosides synthesized, four exhibited strong solvatochromicity, two of which were incorporated into oligodeoxynucleotides (ODNs). These ODN probes were able to detect target DNA through distinct changes in fluorescence intensity and wavelength and acted as effective reporter probes.

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Pyrene-labeled 3-deaza-2'-deoxyadenosine comprising a non-π-conjugated linker (py3z)A (1) was synthesized and its photophysical properties were investigated. Oligodeoxynucleotide (ODN) probes containing (py3z)A (1) exhibited remarkable fluorescence quenching only when the opposite base of the complementary strand was the perfectly matched thymine. Such fluorescence quenching-based ODN probes exhibited excellent on-off switching properties, making them useful tools for single nucleotide polymorphism (SNP) genotyping and for the identification of target genes and structural studies of nucleic acids.

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Aim: Recent studies have indicated that hepatocellular adenoma (HCA) is a heterogenous group of benign tumors with various genetic and clinicopathological characteristics. We delineated the clinicopathological characteristics of HCA subtypes and evaluated the expression of transporter protein OATP1B3 in HCA.

Methods: HCA in 34 Japanese patients were investigated immunohistochemically and classified into four subtypes (HNF1α-inactivated type, H-HCA; β-catenin-activated type, b-HCA; inflammatory type, I-HCA; unclassified type, u-HCA).

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Background: Gastric cancer (GC) is a common cancer globally. miRNA-21 (miR-21) appears to be important in the tumourigenesis of almost all types of human cancer. However its precise localization in GC has yet to be clarified.

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This paper investigates applying statistical topic models to extract and predict relationships between biological entities, especially protein mentions. A statistical topic model, Latent Dirichlet Allocation (LDA) is promising; however, it has not been investigated for such a task. In this paper, we apply the state-of-the-art Collapsed Variational Bayesian Inference and Gibbs Sampling inference to estimating the LDA model.

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