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BACKGROUND The relationship between the thickness of subepithelial collagen bands (CB) and the development of linear ulcerations (LU) in collagenous colitis (CC) remains unclear. The aim of the present study was to compare the clinical and pathological features, including the thickness of CB, in CC patients with and without LU. PATIENTS AND METHODS(More)
BACKGROUND AND AIM The significance of gastric xanthelasma in relation to gastric disease still remains unclear. We investigated the prevalence and significance of gastric xanthelasma in patients with atrophic gastritis and gastric cancer. METHODS A total of 3238 patients who underwent endoscopic examinations of the upper gastrointestinal tract were(More)
BACKGROUND AND STUDY AIMS Colonic endoscopic submucosal dissection (ESD) is a challenging procedure because it is often difficult to maintain good visualization of the submucosal layer. To facilitate colonic ESD, we designed a novel traction method, namely traction-assisted colonic ESD using clip and line (TAC), and investigated its feasibility. PATIENTS(More)
Rectal endoscopic submucosal dissection (ESD) is a highly effective procedure that achieves high en bloc resection regardless of lesion size or location. However, rectal ESD has a higher risk of intraoperative and postoperative bleeding and still difficult for beginners. Therefore, we designed a novel traction technique “traction-assisted rectal ESD using a(More)
BACKGROUND Although steroid injection prevents stricture after esophageal endoscopic submucosal dissection (ESD), some patients require repeated sessions of endoscopic balloon dilation (EBD). We investigated the risk for refractory stricture despite the administration of steroid injections to prevent stricture in patients undergoing esophageal ESD.(More)
BACKGROUND Magnifying endoscopy with narrow-band imaging (ME-NBI) can visualize crypt openings (CO) as slit-like structures in gastric epithelial neoplasia. Visualization of numerous CO is characteristic of low-grade adenoma (LGA). The aim of the present study was to investigate whether visualization of CO by ME-NBI is useful for discriminating between LGA(More)
BACKGROUND AND AIMS Although endoscopic submucosal dissection (ESD) has been applied for superficial pharyngeal cancer, no prospective trials have been reported. To investigate the efficacy and safety of ESD for superficial pharyngeal cancer, we conducted a prospective phase II trial. METHODS Fifty-four patients with 73 lesions were enrolled from(More)
An 85-year-old man with epigastric pain and anorexia was admitted to our hospital. His serum α-fetoprotein (AFP) and protein induced by vitamin K absence or antagonist II (PIVKA II) levels were markedly elevated. Gastrointestinal endoscopy revealed a large mass near the fundus, and computed tomography revealed multiple liver tumors. Intraperitoneal bleeding(More)
BACKGROUND AND STUDY AIMS Magnifying narrow-band imaging (NBI) is more useful than conventional endoscopy for diagnosing early gastric cancer (EGC). However, evaluation of irregular microvascular patterns is subjective and is often difficult, even with expert eyes. The aim of this study was to clarify the most important microvascular patterns in magnifying(More)