Yasumi Katayama
YOU?
Author Swipe
View article: A case of small intestinal bacterial overgrowth in a healthy female patient caused by long-term oral proton pump inhibitor administration
A case of small intestinal bacterial overgrowth in a healthy female patient caused by long-term oral proton pump inhibitor administration Open
Small-intestinal bacterial overgrowth (SIBO) causes gastrointestinal symptoms. Proton pump inhibitors (PPIs) are commonly used for acid peptic diseases; however, their long-term use can alter the gut microbiota, resulting in adverse effect…
View article: A Granular Cell Tumor Arising in a Patient with Long-segment Barrett's Esophagus
A Granular Cell Tumor Arising in a Patient with Long-segment Barrett's Esophagus Open
Esophageal cell tumors are rare. Esophagogastroduodenoscopy performed on a 48-year-old woman revealed an elevated esophageal lesion and the presence of long-segment Barrett's esophagus. Endoscopic ultrasonography showed a 15 mm homogeneous…
View article: Effect of Concomitant Use of Polaprezinc and Vonoprazan-Based Triple Therapy for Helicobacter pylori Eradication
Effect of Concomitant Use of Polaprezinc and Vonoprazan-Based Triple Therapy for Helicobacter pylori Eradication Open
Background: Vonoprazan-based triple therapy has recently been reported as being more effective than proton pump inhibitors for the eradication of Helicobacter pylori (H. pylori), but it is apparent that the eradication rate could be furthe…
View article: Non-improvement of atrophic gastritis in cases of gastric cancer after successful <i>Helicobacter pylori</i> eradication therapy
Non-improvement of atrophic gastritis in cases of gastric cancer after successful <i>Helicobacter pylori</i> eradication therapy Open
BACKGROUND Helicobacter pylori (H. pylori) infection is closely related to the development of gastric cancer (GC). However, GC can develop even after H. pylori eradication. Therefore, it would be extremely useful if GC could be predicted a…
View article: Usefulness of a novel narrow-diameter endoscope for endoscopic balloon dilation of esophageal strictures
Usefulness of a novel narrow-diameter endoscope for endoscopic balloon dilation of esophageal strictures Open
Esophageal stricture is a narrowing of the esophageal lumen, often causing esophageal obstruction [1] [2]. Dilation of strictures by endoscopy using balloon dilation is indicated to restore the patency of the esophageal lumen [3]. We prese…
View article: Progress of ulcerative colitis patients during the COVID-19 pandemic
Progress of ulcerative colitis patients during the COVID-19 pandemic Open
Hepatocellular carcinoma (HCC) is one of the most prevalent tumors worldwide and the leading contributor to cancer-related deaths. The progression and metastasis of HCC are closely associated with altered mitochondrial metabolism, includin…
View article: Endoscopic Treatment for Submucosal Heterotopic Gastric Gland in a Case Observed over Nine Years from Development to Enlargement
Endoscopic Treatment for Submucosal Heterotopic Gastric Gland in a Case Observed over Nine Years from Development to Enlargement Open
A 70-year-old Japanese man with a submucosal gastric mass that continued to increase in size underwent endoscopic submucosal dissection using the pocket creation method. Histologically, some epithelial cell nuclei were enlarged, but there …
View article: Image-enhanced endoscopic findings of <i>Aeromonas enterocolitis</i>
Image-enhanced endoscopic findings of <i>Aeromonas enterocolitis</i> Open
View article: A case of eosinophilic pancreatitis in a patient with ulcerative colitis
A case of eosinophilic pancreatitis in a patient with ulcerative colitis Open
Eosinophilic pancreatitis (EP) is very rare and characterised by infiltration of eosinophils into the pancreatic parenchyma. A 40-year-old man was diagnosed with total-colitis-type ulcerative colitis at the age of 15 years. He was then dia…
View article: Usefulness of a forward-viewing echoendoscope in endoscopic ultrasound-guided recanalization for complete obstruction of the esophagus after chemoradiotherapy for esophageal cancer
Usefulness of a forward-viewing echoendoscope in endoscopic ultrasound-guided recanalization for complete obstruction of the esophagus after chemoradiotherapy for esophageal cancer Open
Complete obstruction of the esophagus after chemoradiotherapy for esophageal cancer is very rare and extremely difficult to treat. We report a recanalization using the rendezvous technique with endoscopic ultrasound (EUS) using a forward-v…
View article: Safe Performance of Track Dilation and Bile Aspiration with ERCP Catheter in EUS-Guided Hepaticogastrostomy with Plastic Stents: A Retrospective Multicenter Study
Safe Performance of Track Dilation and Bile Aspiration with ERCP Catheter in EUS-Guided Hepaticogastrostomy with Plastic Stents: A Retrospective Multicenter Study Open
Objectives: Endoscopic-ultrasound-guided hepaticogastrostomy (EUS-HGS) with plastic stent placement is associated with a high incidence of adverse events that may be reduced using an endoscopic retrograde cholangiopancreatography (ERCP) co…
View article: Usefulness of duckbill‐type anti‐reflux self‐expandable metal stents for distal malignant biliary obstruction with duodenal invasion: A pilot study
Usefulness of duckbill‐type anti‐reflux self‐expandable metal stents for distal malignant biliary obstruction with duodenal invasion: A pilot study Open
Objectives Early obstruction of a self‐expandable metal stent placed for distal malignant biliary obstruction is more likely to occur in the presence of duodenal invasion. An anti‐reflux self‐expandable metal stent (ARMS) has been develope…
View article: COVID-19 pandemic and exacerbation of ulcerative colitis
COVID-19 pandemic and exacerbation of ulcerative colitis Open
This study demonstrated that the COVID-19 pandemic caused exacerbations in UC patients, probably through psychological and physical stress.
View article: Importance of entire stomach observation for diagnosis of anisakiasis
Importance of entire stomach observation for diagnosis of anisakiasis Open
View article: Two cases of gastric penetration by fish bones with differing courses
Two cases of gastric penetration by fish bones with differing courses Open
Most foreign bodies swallowed accidentally are naturally excreted. Gastric penetration by a fish bone is rare due to anatomical and physiological features such as the thick stomach wall, wide lumen and gastric acid. The most common penetra…
View article: Is it enough to consider the number of endoscopy cases to evaluate colon adenoma detection rates?
Is it enough to consider the number of endoscopy cases to evaluate colon adenoma detection rates? Open
View article: Usefulness of a papilla fixation method with an innovative clipping system for bile duct cannulation
Usefulness of a papilla fixation method with an innovative clipping system for bile duct cannulation Open
Selective bile duct cannulation (SBDC) is difficult when the papilla of Vater is unstable because of a long narrow distal segment. Pancreatic duct guidewire placement techniques, such as the double-guidewire technique (DGT), are used to fi…
View article: Predictive value of risk score using Kyoto classification of gastritis a few years prior to diagnosis of early gastric cancer
Predictive value of risk score using Kyoto classification of gastritis a few years prior to diagnosis of early gastric cancer Open
Background and Aim Based on past diagnostic classifications of gastritis, the Kyoto classification of gastritis adopts simpler, more objective gastritis findings according to Helicobacter pylori infection status and evaluates the risk of g…
View article: Endoscopic findings of the colon in a patient with systemic mastocytosis
Endoscopic findings of the colon in a patient with systemic mastocytosis Open
View article: Predictors of 90-day Colonic Diverticular Recurrent Bleeding and Readmission
Predictors of 90-day Colonic Diverticular Recurrent Bleeding and Readmission Open
Objective Colonic diverticular bleeding often recurs, and readmissions are common. The aim of this study was to identify predictors of colonic diverticular recurrent bleeding and readmission within 90 days. Methods Subjects comprised 144 p…
View article: Extramedullary Plasmacytoma of the Stomach
Extramedullary Plasmacytoma of the Stomach Open
View article: Uninodular Fibromyxomatous Gastric Tumor Resected by Endoscopic Submucosal Dissection
Uninodular Fibromyxomatous Gastric Tumor Resected by Endoscopic Submucosal Dissection Open
Esophagogastroduodenoscopy of a 45-year-old woman revealed a submucosal tumor in the gastric antrum. Endoscopic submucosal dissection of the tumor was performed. The histological findings revealed a fibromyxomatous tumor composed of myofib…
View article: Pocket Creation Method of Endoscopic Submucosal Dissection to Ensure Curative Resection of Rectal Neuroendocrine Tumors
Pocket Creation Method of Endoscopic Submucosal Dissection to Ensure Curative Resection of Rectal Neuroendocrine Tumors Open
Purpose: Pancreatic/gastrointestinal tract neuroendocrine neoplasm (NEN) is divided into neuroendocrine tumor (NET) and neuroendocrine carcinoma (NEC) according to the grade of malignancy, and differences are seen in clinical…
View article: Post-colonoscopy colorectal cancer rate in the era of high-definition colonoscopy
Post-colonoscopy colorectal cancer rate in the era of high-definition colonoscopy Open
The PCCRC rate for HD colonoscopy was 0.7%-1.7%, being lower than that for standard-definition colonoscopy (1.8%-9.0%) reported previously employing the same methodology.
View article: Shear wave elastography in hepatitis C patients before and after antiviral therapy
Shear wave elastography in hepatitis C patients before and after antiviral therapy Open
In hepatitis C patients, liver stiffness is higher in treatment-naïve patients than in those showing SVR. SWE may be a predictor of hepatocarcinogenesis in SVR patients.
View article: A Case of Gastric Ulcer With Mucosal Bridge
A Case of Gastric Ulcer With Mucosal Bridge Open
Endoscopic images of the mucosal bridge with gastric ulcer are unusual. The mucosal bridge is presumed to have changed to a special form based on repeated development of gastric ulcer. The clinical course of mucosal bridge is unclear.
View article: Large venous malformation of right colonic flexure
Large venous malformation of right colonic flexure Open
Colonoscopy of a 38-year-old woman with persistent diarrhea despite drug therapy revealed no inflammatory changes in the colonic mucosa, but a dark blue, elevated lesion with a diameter of 3 cm was incidentally discovered in the right colo…
View article: Direct invasion of HCC to the gastric wall diagnosed by endoscopic ultrasonography-guided fine needle aspiration
Direct invasion of HCC to the gastric wall diagnosed by endoscopic ultrasonography-guided fine needle aspiration Open
A 60-year-old man was transported to our hospital with hematemesis. Upon admission, emergency esophagogastroduodenoscopy revealed an elevated, submucosal lesion just below the gastroesophageal junction. The top of the lesion was ulcerated …
View article: A case of eosinophilic gastroenteritis with repeated recurrence
A case of eosinophilic gastroenteritis with repeated recurrence Open
A 49-year-old woman visited our hospital with chief complaints of nausea, vomiting, stomachache, and diarrhea that had been appearing every few months for 5 years. Computed tomography (CT) showed thickening of the gastric and small intesti…