Publications by authors named "Sasagawa Y"

A 54-year-old man presented with gait disturbances, urinary incontinence, and headache for 6 months. Head computed tomography indicated several high-density mass lesions in the quadrigeminal cistern, causing occlusive hydrocephalus. Digital subtraction angiography confirmed tentorial dural arteriovenous fistulae (AVF).

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Nerves and blood vessels must be protected during brain tumor surgery, which has traditionally relied on microscopes. In the 2000s, endoscopes and related equipment were developed for neurosurgery. In this review, we aim to outline the role of endoscopes in brain tumor surgery and discuss the emerging use of exoscopes.

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Belumosudil mesylate is a selective Rho-associated coiled-coil kinase 2 inhibitor with immunomodulatory and antifibrosis effects. This multicenter, open-label, single-arm study evaluated belumosudil 200 mg once daily as second or subsequent line of therapy (LOT) in 21 Japanese patients ≥12 years of age with steroid-dependent/steroid-resistant chronic graft-versus-host disease (cGVHD). The primary endpoint of best overall response rate (ORR) at 24 weeks after enrollment of the last patient was 85.

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Background: Pituitary adenomas show typical visual field defects that begin superiorly and progress inferiorly. The cause of atypical visual field defects that start inferiorly remains unclear. This study aimed to understand this phenomenon using magnetic resonance imaging (MRI).

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Objectives: Factors that affect the change of first-line antimicrobial agents were investigated to further promote their appropriate use.

Methods: This descriptive study used an electronic medical records database. Total 16,353 of the 199,896 patients enrolled between 1996 and 2019 met the inclusion criteria and formed the overall pediatric acute otitis media (AOM) cohort.

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Objectives: : Although numerous risk prediction models have been proposed, few such models have been developed using neural network-based survival analysis. We developed risk prediction models for three cardiovascular disease risk factors (diabetes mellitus, hypertension, and dyslipidemia) among a working-age population in Japan using DeepSurv, a deep feed-forward neural network.

Methods: : Data were obtained from the Japan Epidemiology Collaboration on Occupational Health Study.

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The paraventricular nucleus of the thalamus (PVT) projects axons to multiple areas, mediates a wide range of behaviors, and exhibits regional heterogeneity in both functions and axonal projections. Still, questions regarding the cell types present in the PVT and the extent of their differences remain inadequately addressed. We applied single-cell RNA sequencing to depict the transcriptomic characteristics of mouse PVT neurons.

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Article Synopsis
  • Thrombotic thrombocytopenic purpura (TTP) is a serious condition that can occur during pregnancy, and two cases of immune-mediated TTP (iTTP) in pregnant women were studied.* -
  • The first woman was treated with plasma exchange and steroids and had a successful cesarean delivery at 27 weeks, while the second woman experienced intrauterine fetal death and had multiple treatments before delivering at 37 weeks.* -
  • Monitoring plasma levels of ADAMTS13 and managing underlying systemic lupus erythematosus may help prevent iTTP relapses and improve outcomes for pregnant women.*
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Objective: Surgical treatment of brainstem cavernous malformations (CMs) is challenging. Surgery using the endoscopic transsphenoidal transclival approach (eTSTCA) is reported as a useful alternative for ventral brainstem CMs. However, CMs located in the ventral midline of the brainstem are rare, and only a small number of case reports on these CMs treated with the eTSTCA exist.

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Objective: This study elucidated the efficacy of Relugolix (REL) on the reduction of uterine volume and clinical symptoms for the treatment of adenomyosis.

Methods: We conducted a retrospective cohort study of patients who received REL (40 mg for about 20 weeks) and who underwent a hysterectomy for adenomyosis or fibroids. We divided patients into two groups: adenomyosis coexisting with fibroids (Group A) and fibroids only (Group B); the groups were determined by a postoperative pathological examination.

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Plants can regenerate their bodies via de novo establishment of shoot apical meristems (SAMs) from pluripotent callus. Only a small fraction of callus cells is eventually specified into SAMs but the molecular mechanisms underlying fate specification remain obscure. The expression of WUSCHEL (WUS) is an early hallmark of SAM fate acquisition.

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  • Defects in gastric progenitor cell differentiation can lead to disorders like atrophic gastritis, intestinal metaplasia, and gastric cancer, but the normal differentiation processes are not fully understood.
  • Using single-cell RNA sequencing (Quartz-Seq2), the study explored how progenitor cells differentiate into pit, neck, and parietal cells in healthy mouse stomach tissues.
  • The research found that EGFR-ERK signaling encourages pit cell differentiation while NF-κB signaling keeps progenitor cells undifferentiated, revealing that EGFR promotes differentiation in normal conditions rather than simply triggering cell division, which is commonly linked to gastric cancers.
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Optical coherence tomography (OCT) is a useful tool for predicting visual recovery after the removal of pituitary tumors. However, the utility of OCT in patients with pituitary tumors and a normal visual field is unclear. We aimed to analyze OCT features in pituitary tumors without visual field defects.

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  • Intramural pregnancy is a rare type of ectopic pregnancy that occurs within the uterine wall, isolated from both the uterine cavity and fallopian tube.
  • A case report documents an instance of intramural ectopic pregnancy, highlighting its rarity.
  • Patients with a history of intrauterine surgery or myomectomy should be aware of the potential risk for intramural pregnancy, despite its uncommon nature.
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Background: Prostate carcinoma rarely metastasizes to the central nervous system. However, when it does, a dural lesion is a common and possible misdiagnosis of meningioma. Here, we describe a case of a 77-year-old man with dural metastasis from prostate carcinoma of the tuberculum sellae.

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  • The study investigates the link between uterine endometrium microbiota (UEM) and pregnancy outcomes in women who have experienced recurrent pregnancy loss (RPL).
  • It involved 67 women with a history of two or more RPL, with UEM analyzed through endometrial biopsy and sequencing, ultimately tracking 63 women's pregnancies over 14 months.
  • Findings revealed that higher levels of Ureaplasma species in UEM and a greater number of previous miscarriages are significant risk factors for normal karyotype miscarriages and preterm deliveries in future pregnancies.
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Background: Primary central nervous system lymphoma (PCNSL) rarely originates in the hypothalamus. Hypothalamic PCNSL can present with various symptoms specific to dysfunction of the hypothalamus, including consciousness disturbance, cognitive impairment, hypopituitarism, and diabetes insipidus (DI). However, it remains unclear whether syndrome of inappropriate secretion of antidiuretic hormone (SIADH) can present as an initial sign of hypothalamic PCNSL.

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Immune dysregulation plays a key role in the pathogenesis of autism. Changes occurring at the systemic level, from brain inflammation to disturbed innate/adaptive immune in the periphery, are frequently observed in patients with autism; however, the intrinsic mechanisms behind them remain elusive. We hypothesize a common etiology may lie in progenitors of different types underlying widespread immune dysregulation.

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The 'open' and 'compact' regions of chromatin are considered to be regions of active and silent transcription, respectively. However, individual genes produce transcripts at different levels, suggesting that transcription output does not depend on the simple open-compact conversion of chromatin, but on structural variations in chromatin itself, which so far have remained elusive. In this study, weakly crosslinked chromatin was subjected to sedimentation velocity centrifugation, which fractionated the chromatin according to its degree of compaction.

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Objectives: We investigated changes in prescriptions for antimicrobial agents to treat children with acute otitis media (AOM).

Methods: A descriptive study using an electronic medical record database. Of 199,896 patients enrolled between 2001 and 2019, a total of 10,797 were aged <16 years and had AOM as their first and primary disease (overall pediatric AOM cohort).

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Dementia with Lewy bodies (DLB) is recognized as the second most common form of dementia in aged people. It is well known that patients with DLB often develop various autonomic symptoms. Here, we present a case in which there was sick sinus syndrome mimicking the DLB-related autonomic dysfunctions.

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Purpose: Thyrotropin-secreting pituitary adenoma (TSHoma) is rare but occasionally causes cardiovascular complications such as atrial fibrillation (AF) due to hyperthyroidism. Graves' disease (GD) is a common hyperthyroid condition often associated with subclinical AF. Some reports have shown echocardiographic changes in patients with GD.

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Although generally a safe procedure, serious postoperative complications after endoscopic third ventriculostomy (ETV) for obstructive hydrocephaly have been rarely reported, such as delayed obstruction of the stoma at the third ventricle floor. A 20-year-old male was referred to our department because of severe headache and diplopia. A pineal tumour and obstructive hydrocephaly were detected in preoperative imaging.

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