Publications by authors named "Tsuboi A"

Objectives: We aimed to determine the compliance, safety, and acceptance of colon capsule endoscopy (CCE) and small bowel capsule endoscopy (SBCE) in an out-of-clinic setting remotely supported by medical staff.

Methods: We enrolled 30 examinees (24 with CCE and six with SBCE) who had not undergone CE at six gastroenterological centers. All examinees were provided with instructions on equipment and bowel preparations.

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Objective:  Epilepsy is common among patients with severe motor and intellectual disabilities (SMID) patients, often taking a prolonged and intractable course. Lacosamide (LCM) is widely used to treat epilepsy in both adults and children. We assess the efficacy and tolerability of LCM among pediatric and young adult epilepsy patients with SMID who suffer from intractable seizures.

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Article Synopsis
  • Serum markers like gastrin and pepsinogen help assess the risk of gastric cancer, but their effectiveness in predicting metachronous gastric cancer after endoscopic submucosal dissection (ESD) remains uncertain.
  • A study analyzed 197 patients with gastric cancer lesions who underwent ESD, finding significant predictive factors such as severe mucosal atrophy and high gastrin levels that increase the likelihood of metachronous gastric cancer.
  • The research indicates that elevated serum gastrin levels, especially in patients not using proton pump inhibitors, could serve as a valuable tool for monitoring gastric cancer risk after ESD.
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Wilms' tumor protein 1 (WT1)-targeted immunotherapy has been used in patients with leukemia and solid tumors. However, the spontaneous WT1-specific immune response before WT1 peptide vaccination in patients with WT1-expressing tumors (PTs) remains unclear. Therefore, we investigated whether WT1-specific cytotoxic CD8 T-lymphocytes (CTLs) are clonally expanded in the peripheral blood outside of tumor sites.

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Background/objectives: Colorectal neoplasia developing from ulcerative colitis mucosa (CRNUC) can be divided into ulcerative colitis-associated neoplasia (UCAN) and non-UCAN; however, it is often difficult to distinguish UCAN from non-UCAN during a biopsy diagnosis. We investigated whether a genomic analysis could improve the diagnostic accuracy of UCAN using biopsy specimens.

Methods: In step 1, 14 CRNUCs were used to examine whether the genomic landscape of biopsy and resection specimens matched.

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Background/objectives: Eradication therapy for gastritis was approved for insurance coverage by the Japanese government in 2013. Since then, the incidence of gastric cancer discovered after eradication (GCAE) has increased. However, there are only a few reports of GCAE diagnosed more than 10 years after eradication.

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  • This study compares two endoscopic techniques, endoscopic submucosal dissection (ESD) and endoscopic laryngo-pharyngeal surgery (ELPS), for treating superficial pharyngeal carcinomas to assess their effectiveness.
  • A review of 93 patients showed that ELPS had significantly shorter procedure times and led to less laryngeal edema compared to ESD, although long-term survival outcomes were similar for both methods.
  • The findings suggest that while ELPS is quicker and less damaging, it has limitations in treating narrow areas; therefore, combining ELPS with ESD may enhance treatment efficacy.
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Background: Portal hypertensive enteropathy (PHE) is a small-bowel lesion observed in patients with portal hypertension. The clinical significance of endoscopic findings in PHE remains unclear. We aimed to clarify the clinical significance and predictive factors of capsule endoscopic findings in patients with PHE based on long-term outcomes.

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A long-term indwelling catheter may be indicated in clinical situations, such as chronic diseases of the genitourinary or neurological systems. In addition to the risks of infection, trauma, and bleeding, a catheter's permanence can affect psycho-emotional and socioeconomic dimensions. We aimed to understand how the need to use a long-term indwelling catheter affects this patient's self-perception, interrelationships, and self-care.

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  • COVID-19, caused by SARS-CoV-2, can lead to gastrointestinal issues like severe diarrhea, which may persist even after recovery from the virus.
  • A 50-year-old man with COVID-19 pneumonia developed refractory diarrhea that reached alarming volumes, leading to further medical intervention and treatment for a suspected enterocolitis linked to the virus.
  • Administering methylprednisolone significantly improved the patient's condition, suggesting that corticosteroids may be beneficial for post-COVID-19 patients experiencing severe diarrhea due to abnormal immune responses.
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Various mammals have shown that sensory stimulation plays a crucial role in regulating the development of diverse structures, such as the olfactory bulb (OB), cerebral cortex, hippocampus, and retina. In the OB, the dendritic development of excitatory projection neurons like mitral/tufted cells is influenced by olfactory experiences. Odor stimulation is also essential for the dendritic development of inhibitory OB interneurons, such as granule and periglomerular cells, which are continuously produced in the ventricular-subventricular zone throughout life.

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Objectives: We aimed to evaluate the usefulness and acceptability of CapsoCam Plus (CapsoCam) in Japanese patients.

Methods: This retrospective single-center study enrolled 930 patients with suspected small-bowel bleeding (SSBB) who underwent capsule endoscopy. Thirty-three patients using CapsoCam and PillCam SB3 (SB3) were matched using propensity score matching.

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Article Synopsis
  • - The study assessed the safety and effectiveness of endoscopic submucosal dissection (ESD) for treating esophageal squamous cell carcinoma in older patients (65+ years) to determine its validity in this demographic.
  • - Analysis of 398 patients revealed a high histological en bloc resection rate of 98%, with manageable postoperative complications and a 5-year overall survival rate of 78.9%.
  • - While ESD is deemed safe for elderly patients, the need for additional treatments may depend on individual health conditions, particularly those classified as high-risk.
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Background: Glutaminase 1 (GLS1), a key enzyme in glutamine metabolism in cancer cells, acts as a tumor promoter and could be a potential therapeutic target. CB-839, a GLS1-specific inhibitor, was developed recently. Herein, we aimed to elucidate the anti-tumor effects and mechanism of action of CB-839 in colorectal cancer (CRC).

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In Japan, accessible Helicobacter pylori (Hp) eradication therapy is associated with an increase in the prevalence of gastric cancers (GCs) in Hp uninfected stomachs. Signet ring cell carcinoma (SRCC) is the most common of these GCs. Intramucosal SRCC with poorly differentiated adenocarcinoma (PDA) occurring in Hp uninfected gastric mucosa is rare; furthermore, many Hp uninfected pure SRCCs exhibit discoloration and flat or slightly depressed lesions, and morphological elevation is relatively rare.

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Background: Esophageal squamous cell carcinoma (ESCC) is sometimes detected in non-drinker and non-smoker females who are considered to have very low risk of ESCC development in daily practice. This study examined the clinicopathological and genomic characteristics of ESCCs in females with no history of drinking and smoking.

Methods: The sample comprised 118 ESCC lesions occurring in 95 female patients who underwent endoscopic submucosal dissection at our department between January 2008 and December 2019.

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Article Synopsis
  • The study aimed to profile participants from Miyagi Prefecture during the second phase of the Tohoku Medical Megabank Community-Based Cohort Study, focusing on their characteristics based on their initial survey participation types.
  • Conducted between June 2017 and March 2021, the survey involved questionnaire data as well as blood, urine, and physiological tests, with three participation types identified in the baseline survey.
  • Results showed a 57.7% participation rate, with an 80% participation rate among those visiting community support centers, revealing similar traits among Type 1 and Type 2 respondents, ultimately aiding in understanding the long-term health impacts of disasters.
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Video 1A case of an inflammatory fibroid polyp of the ileum that was safely resected using gel immersion EMR with double-balloon endoscopy.

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Background: Methods to prevent esophageal stenosis (ES) after endoscopic submucosal dissection (ESD) for superficial esophageal squamous cell carcinoma (ESCC) have received increasing attention. Although steroid administration is a prophylactic treatment, the risk factors for ES during prophylactic steroid therapy remain unknown. Therefore, this study aimed to retrospectively evaluate the risk factors for refractory ES in patients administered prophylactic steroids after ESD for ESCC.

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Coronavirus disease 2019 (COVID-19) is an emerging respiratory infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). COVID-19 has been reported to lead to acute cardiac injury, but previous research indicated that the mechanism is different from that of other viruses and remains poorly understood. Herein, we describe a case of COVID-19-associated sudden death, in a healthy 47-year-old man after developing diffuse cardiac necrosis.

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Introduction: Drowning is a comprehensive and exclusive diagnosis at autopsy. Autopsy findings such as pleural effusion and waterlogged lungs contribute to the diagnosis. Herein, we aim to reveal the practical usefulness and postmortem changes of the maxillary sinus fluid volume to diagnose drowning.

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Purpose: Dental floss clip (DFC) traction-assisted endoscopic submucosal dissection (ESD) is widely performed owing to its simplicity. This study aimed to clarify the appropriate indications for the DFC traction method in early gastric cancer when ESD is performed by less-experienced endoscopists.

Methods And Methods: We retrospectively analyzed 1,014 consecutive patients who had undergone gastric ESD performed by less-experienced endoscopists between January 2015 and December 2020.

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Objectives: Underwater endoscopic mucosal resection (UEMR) is a simpler procedure for superficial non-ampullary duodenal epithelial tumors (SNADET) than conventional endoscopic mucosal resection (cEMR). This study aimed to evaluate whether cEMR can be substituted by UEMR for SNADET in terms of effectiveness, safety, and learning curve.

Methods: A total of 157 consecutive patients with 203 SNADETs ≤20 mm in diameter, including 107 lesions resected by cEMR and 96 lesions resected by UEMR, between January 2019 and May 2023, were retrospectively recruited.

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Background And Aim: Although small-bowel capsule endoscopy (CE) is widely used for obscure gastrointestinal bleeding (OGIB), long-term outcomes for OGIB patients after negative CE remain unclear. Herein, we defined negative CE as P0 (no bleeding potential) or P1 (less likely to bleed), based on the P classification using CE. We aimed to clarify long-term outcomes of patients with OGIB after negative CE.

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Trauma has been suspected as a factor leading to development of angiosarcoma, a malignant soft-tissue tumor. We conducted a forensic autopsy to investigate a putative relation between a motor vehicle collision and the driver's later death from angiosarcoma. A vehicle operated by a man in his 60 s collided with an oncoming vehicle at a curve.

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