Publications by authors named "Hiroyuki Imaeda"

Background/objectives: The incidence of pancreatic cancer is increasing, and it has a poor prognosis. Also, it is often refractory to standard chemotherapy. Psychological stress influences the development of some malignant neoplasms; however, its immunological mechanism is unclear.

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A 47-year-old male patient with anal pain underwent a colonoscopy 12 years after Crohn's disease diagnosis. A biopsy from the protuberance of the anal canal revealed a well-differentiated adenocarcinoma. A reexamination of the histopathological specimen at our hospital revealed anal high grade dysplasia (HGD), thereby changing the initial diagnosis.

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Introduction: Vonoprazan (VPZ) is a potent gastric acid secretion inhibitor used to improve the outcomes of Helicobacter pylori (H. pylori) eradication treatments. However, the increasing prevalence of antibiotic-resistant H.

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Background And Aims: Laser endoscopy has a linked color imaging (LCI) mode which has been reported to be superior to white light imaging (WLI) in detecting early gastric cancer (EGC). In this study, we retrospectively investigated the characteristics of superficial gastric neoplasms detected not by WLI but by LCI.

Patients And Methods: From April 2018 to May 2023, EGC or gastric adenoma identified by EGD was observed using LCI after WLI.

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Biologics against interleukin-5 were administered to five patients with eosinophilic gastroenteritis (EGE) and bronchial asthma (BA). BA and abdominal symptoms as well as changes in steroid dose and the blood eosinophil count were examined. The man-to-woman ratio was 1:4.

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Introduction: Eosinophilic gastrointestinal disease (EGID) is divided into eosinophilic esophagitis (EoE) and non-eosinophilic esophagitis eosinophilic gastrointestinal disease (non-EoE-EGID), based on the involved gastrointestinal organs. The present survey was performed to provide an overview of the current status of the epidemiology, diagnosis, and treatment of EGID in Asia.

Methods: Responses to the questionnaire were obtained from 228 doctors at various institutions in eight Asian countries.

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Objectives: The endoscopic channel can be damaged by instruments during use and cleaning, leading to contamination, infection, and increased repair costs. However, few devices are available to observe the inside of the endoscopic channel. This study employed an ultrafine-diameter scope to examine damage in the endoscopic channel.

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Background & Aims: Although biologic therapy has revolutionized the treatment of Crohn's disease (CD), surgery remains unavoidable in cases involving ileal complications. We aimed to evaluate the efficacy of biologics on proximal ileal lesions using balloon-assisted enteroscopy (BAE).

Methods: This open-label multicenter prospective study was conducted at tertiary referral centers in Japan.

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Background And Aim: The use of a hood at the tip of a colonoscope enables aspiration, inversion of the diverticulum, and observation of the inside of the diverticulum. In most previous studies, a short hood was used; however, observation of the diverticulum is often inadequate. Long food is promising by previous research, but it was a retrospective study using propensity matching and has some limitations.

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Background: Adenoma detection rate (ADR) is an important indicator of colonoscopy quality and colorectal cancer incidence. Both linked-color imaging (LCI) with artificial intelligence (LCA) and LCI alone increase adenoma detection during colonoscopy, although it remains unclear whether one modality is superior. This study compared ADR between LCA and LCI alone, including according to endoscopists' experience (experts and trainees) and polyp size.

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Revised idiopathic pulmonary fibrosis treatment guidelines were published in 2015, and nintedanib was conditionally recommended. Although diarrhea is reported to be a common major adverse event associated with nintedanib, there have been few reports on detailed endoscopic findings of nintedanib-associated enterocolitis. A 74-year-old woman was diagnosed with idiopathic pulmonary fibrosis 4 years ago in May.

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Pneumatosis cystoides intestinalis is an uncommon disease that rarely causes intussusception. We report the case of a 16-year-old male patient with intermittent abdominal pain who was diagnosed with intussusception. The patient had no history of raw food ingestion, fever, diarrhea, or hematochezia.

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The pathologic diagnosis of duodenal tumors is a developing field; however, its overview remains unclear. We describe a rare case of a duodenal gastric-type neoplasm in a 50-year-old woman. She visited her primary care doctor with complaints of upper abdominal pain, tarry stools, and shortness of breath on exertion.

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AdvanCE is a useful device in patients who cannot swallow capsule endoscopes, or when these remain in the patient's stomach without passing into the duodenum. A net or snare may be used to guide the capsule endoscope into the duodenum when the capsule endoscope becomes stuck in the stomach, but it may be difficult to guide the capsule into the duodenum in some cases, particularly in those of waterfall stomach. In such cases, AdvanCE is found to be an effective guidance tool.

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Background: Vonoprazan, a potassium-competitive acid blocker (VPZ), significantly reduces postoperative bleeding after gastric ESD; however, there is no consensus on the appropriate treatment duration. We conducted a randomized controlled study to demonstrate that the 3-week administration of VPZ is not inferior to the 8-week administration for ulcer healing.

Methods: This is a prospective, open-label multicenter randomized controlled trial.

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Zinc intake has reduced hospitalizations in patients with ulcerative colitis (UC), highlighting the need to maintain blood zinc levels. This prospective study investigated whether the promotion of zinc intake and a Japanese diet (high in -3 fatty acids) could induce clinical remission in patients with mild active UC. Patients with mild active UC were randomly assigned to either (1) continue an unrestricted diet or (2) receive nutritional guidance promoting zinc intake and a Japanese diet.

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Several new treatments for ulcerative colitis have been developed recently. The depletion of leukocytes by granulocyte and monocyte adsorption apheresis (GMA) was developed and adapted for patients with ulcerative colitis with rare adverse events. We investigated whether treatment with GMA and prednisolone (GMA + PSL) is more effective than PSL alone for patients with moderate to severe ulcerative colitis.

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Article Synopsis
  • The study focuses on the importance of understanding the structure of the bile duct opening to improve bile duct cannulation success and investigates whether texture and color enhancement imaging (TXI) can help inexperienced trainees recognize the papilla of Vater better than standard white light imaging.
  • Involving 31 patients, trainee endoscopists used both imaging methods to identify the papilla, and their accuracy was compared to that of supervising physicians using statistical analysis.
  • Results showed that TXI significantly improved the congruence in identification among trainees, suggesting its potential as a useful tool in clinical settings to reduce cannulation time and lower the risk of complications like pancreatitis.
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Background And Aim: This study aimed to compare the mean number of adenomas in patients undergoing Endo-wing-assisted colonoscopy (EAC) and transparent hood-assisted colonoscopy (TAC).

Methods: Patients undergoing colonoscopy for positive fecal immunochemical tests, colon polyp surveillance, and evaluation of abdominal symptoms at a single institution were randomly assigned to the EAC or TAC group. The mean number of adenomas per patient, adenoma detection rate, cecal intubation time, withdrawal time, mean number of adenomas per location, and adenoma size were compared.

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Article Synopsis
  • A retrospective study was conducted on 10,156 patients to assess the safety and effectiveness of endoscopic delivery of capsule endoscopes, including small bowel, patency, and colon capsules.
  • The endoscopic delivery method was successful in a majority of cases, with mild complications reported in about 21.6% of patients, mostly minor issues like mucosal damage and abdominal pain.
  • Results showed that younger patients (<16 years) had a higher success rate of capsule ingestion, while older patients (≥16 years) faced more challenges, predominantly due to conditions like dysphagia and other health issues.
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