Publications by authors named "Ken'ichi Mizuno"

Objective Crohn's disease (CD) is a chronic inflammatory bowel disease that is associated with malnutrition. Sarcopenia is a malnutrition condition characterized by skeletal muscle loss that impairs the physical function. We investigated the clinical characteristics of patients with CD with sarcopenia and sarcopenic obesity (sarcopenic-o).

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  • This study examined the safety of gastrointestinal endoscopic procedures in patients taking edoxaban, focusing on the incidence of delayed bleeding during and after the operations.
  • Among the 21 patients analyzed, 14% experienced severe delayed bleeding, while no minor bleeding or thromboembolic events were reported.
  • The findings suggest that the risk of delayed bleeding with edoxaban is manageable, but higher blood pressure may raise the risk, warranting further investigation.
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Ulcerative colitis-associated neoplasia (UCAN) harbors unique genetic alterations and mutational tendencies. The clinical application of gene panel testing enables precision medicine by tailoring treatment to individual gene alterations. We hypothesized that gene panel testing may detect clinically important genetic alterations in UCAN, with potential usefulness for the diagnosis and treatment of UCAN.

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Purpose: Gastric neoplasia is a common manifestation of familial adenomatous polyposis (FAP). This study aimed to elucidate the clinical characteristics, endoscopic features including fundic gland polyposis (FGPsis), and treatment outcomes of gastric neoplasms (GNs) in patients with FAP.

Materials And Methods: A total of 35 patients diagnosed with FAP, including nine patients from four pedigrees who underwent esophagogastroduodenoscopy (EGD), were investigated regarding patient characteristics, GN morphology, and treatment outcomes.

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We present a case of a bronchoesophageal fistula after a lobectomy with systematic mediastinal lymphadenectomy for lung adenocarcinoma. A 70-year-old woman was readmitted with postprandial cough, fever, and dysphagia on postoperative day 13. Computed tomography revealed a bronchoesophageal fistula between the left main bronchus and esophagus.

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  • The study investigates the role of the Atm-Chk2 pathway in DSS-induced colitis using a mouse model, which mimics human colitis.
  • Researchers found that activating this pathway in response to DNA damage leads to inflammation and cell death in the colon.
  • In knockout mice lacking a specific protein, the severity of colitis was significantly reduced, suggesting this protein's contribution to the disease process.
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Objective Esophageal diverticulum is rare, and the concomitance of esophageal motility disorders (EMDs) and the efficacy of novel endoscopic treatment have not been investigated in Japan. Methods An examination including high-resolution manometry (HRM) was performed for patients with both EMDs and epiphrenic diverticulum. EMD-related epiphrenic diverticulum and Zenker's diverticulum were treated using salvage peroral endoscopic myotomy (s-POEM) and endoscopic diverticulotomy, respectively.

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Gastric cancer is a Lynch syndrome (LS)-associated tumor, with the cumulative lifetime risk in LS patients estimated to be 5.8-13%. Hence, surveillance for gastric cancer is important for LS patients, especially in those with a family history of gastric cancer or of Asian descent.

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  • Diversion colitis (DC) is an inflammatory condition linked to disrupted fecal flow and nutrient deficiencies resulting from changes in gut bacteria, but how it develops is not fully understood.
  • A study investigated the impact of fecal microbiota transplantation (FMT) in five patients with DC, finding they experienced endoscopic remission and symptom improvement after treatment.
  • The research highlights that FMT significantly alters the microbiota in the diverted colon, suggesting it may be a promising treatment for DC due to its role in restoring normal gut function.
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  • * A study examined the safety and effectiveness of ESD in treating GTC in 31 patients, showing an 80.6% complete resection success rate and good long-term survival outcomes (67.6% at 3 years, 47.7% at 5 years).
  • * Although ESD for GTC was deemed safe with minimal complications, regular long-term gastroscopy is necessary for early detection, as patients are at increased risk for other cancers and comorbidities
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Mesenteric hematoma is an uncommon condition caused by focal bleeding in the mesenteric vessels. Hematomas are related to trauma, pancreatitis, arteriopathy, and the use of antithrombotic agents. Although hematomas cause intestinal stenosis by compressing the adjacent small bowel, duodenal stenosis due to hematoma is rare.

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A 40-year-old man with slightly depressed (0-IIc) type gastric cancer of the pyloric anterior gastric area underwent pre-operative screening for tetralogy of Fallot and endoscopic submucosal dissection (ESD) and was tested for antigens and antibodies. Both tests were negative. He did not have a history of eradication.

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We herein report a rare case of HCC metastases to the ovary and peritoneum in a 61-year-old female patient who has achieved 11-year survival with multidisciplinary therapy. The patient was diagnosed with HCC during balloon angioplasty performed for Budd-Chiari syndrome in 1994 and underwent partial hepatectomy twice. Five years after the second hepatectomy, allochronic recurrence of a single nodule detected in S8 was treated by radiofrequency ablation, followed by percutaneous ethanol injection therapy and stereotactic body radiotherapy.

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Background/aims: Patients with achalasia have a high incidence of esophageal squamous cell carcinoma (ESCC), which may be associated with alterations in oral and esophageal microbiota caused by food stasis. This study compared the oral and esophageal microbiota of patients with achalasia before and after peroral endoscopic myotomy (POEM). It also compared patients with achalasia to those with ESCC.

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It is reported that an increase in aerobic bacteria, a lack of short-chain fatty acids (SCFAs), and immune disorders in the diverted colon are major causes of diversion colitis. However, the precise pathogenesis of this condition remains unclear. The aim of the present study was to examine the microbiota, intestinal SCFAs, and immunoglobulin A (IgA) in the diverted colon.

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An asymptomatic epiphrenic diverticulum (ED) was diagnosed in a man undergoing annual esophagogastroduodenoscopy (EGD) at another hospital 40 years before he presented to our hospital at age 63 years for his annual EGD. However, because substantial food retention was found in the ED, we could not confirm a lesion. After the retained food was removed endoscopically, a second EGD showed a reddish, flat lesion with an elevated mass within the ED.

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Myotonic dystrophy is a progressive disorder mainly affecting the voluntary muscles. We herein report a rare case of myotonic dystrophy complicated with high-resolution manometry-defined achalasia, the pathology of which is absent relaxation of the smooth muscles of lower esophageal sphincter (LES). In the present case, achalasia was considered a complication of myotonic dystrophy instead of sporadic achalasia, as on performing high-resolution manometry, the finding of an impaired LES relaxation (myotonic phase) changed to a totally emaciated LES function (muscle weakness phase) as myotonic dystrophy progressed.

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Background And Aim: Patients with achalasia experience weight loss because of dysphagia caused by impaired relaxation of the lower esophageal sphincter. This study aimed to use dual bioelectrical impedance analysis (BIA) to determine the change in bodyweight and body composition in patients with achalasia before and after peroral endoscopic myotomy (POEM).

Methods: Patients with achalasia who underwent POEM from 2013 to 2018 (n = 72) were retrospectively analyzed for change in bodyweight before and after 3 months.

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Several previous reports indicate that endoscopic injection of triamcinolone acetonide (TA) after widespread endoscopic submucosal dissection (ESD) is effective for preventing esophageal stricture. We investigated the efficacy of injecting TA in two sessions for preventing stricture formation post-ESD. Sixty-six consecutive patients with widespread mucosal defects that affected more than three-fourths of the circumference of the esophagus were included.

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Background And Aim: Functional gastrointestinal disorders are the most common disorders in gastroenterology and are currently considered as gut-brain interaction disorders with multiple related factors including motility disturbance. However, high-resolution manometry (HRM) had revealed a new disease concept known as minor esophageal motility disorders. This study aimed to investigate the correlation between functional esophageal disorders (FEDs) and minor esophageal motility disorders.

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Esophageal diverticula are rare conditions that cause esophageal symptoms, such as dysphagia, regurgitation, and chest pain. They are classified according to their location and characteristic pathophysiology into three types: epiphrenic diverticulum, Zenker's diverticulum, and Rokitansky diverticulum. The former two disorders take the form of protrusions, and symptomatic cases require interventional treatment.

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