نتایج جستجو برای: esophagus echocardiography
تعداد نتایج: 62404 فیلتر نتایج به سال:
BACKGROUND/AIMS The sensitivity of the upper and lower esophageal mucosa to acid is considered to differ. We investigated the relationship between pH changes in different sites of the esophagus and generation of gastroesophageal reflux symptoms during an acid infusion test. METHODS An acid infusion catheter was placed at 5 or 15 cm above the lower esophageal sphincter (LES) in 18 healthy volu...
Barrett's esophagus has traditionally been regarded as the most severe end of the spectrum of gastroesophageal reflux disease and is of great clinical importance in view of the association with esophageal adenocarcinoma. Studies have documented high levels of esophageal acid exposure in Barrett's esophagus. Various pathogenetic mechanisms underlie this phenomenon. These include abnormalities in...
Mesenchymal tumor of the esophagus is rare, and the most common mesenchymal tumor of the esophagus is leiomyoma [1-3]. The incidence of esophageal leiomyoma from autopsy cases ranges from 0.005 to 5% [2, 3]. Although detailed histopathological examination of autopsy and surgically resected case series demonstrated that its incidence is higher at 7.9% [1]. This disease is typically found in pati...
background: the term caustic generally refers to alkaline and the term corrosive generally refers to acidic agents' injury however, in medical literature caustic is frequently a term applied to both substances. ingested alkali typically damage the esophagus more than stomach or duodenum, whereas acids usually cause more severe gastric injury. since esophagus has a slightly alkaline ph, its...
Thirty patients with malignant esophageal stenosis underwent Ultraflex esophageal stent deployment and were followed up for a maximum of 29 months from June 1995 to August 2001 in Tenri Hospital. Twelve stents were in the upper esophagus, and nine each in the middle and lower esophagus. The procedures were successful and dysphagia scores improved from 2.9 to 0.7. Major complications such as eso...
Esophageal adenocarcinoma is preceded by the development of reflux-related intestinal metaplasia or Barrett esophagus, which is a response to inflammation of the esophageal squamous mucosa, reflux esophagitis. Gastroesophageal reflux impairs the mucosal barrier in the distal esophagus, allowing chronic exposure of the squamous epithelium to the diverse microbial ecosystem or microbiome and indu...
Primary malignant melanoma of esophagus is a rare but highly aggressive neoplasm, with an incidence less than 0.2% of all primary esophagus neoplasms. There are no clinical differences from other forms of esophagus cancer. Because initial symptoms are nonspecific, the patients are usually diagnosed at a late stage. The prognosis is poor, and curative effect seems disappointed. Several reports s...
The most significant precancerosis in the esophageal cancer is Barrett's esophagus. The risk of malignant transformation is determined primarily in accordance with the degree of dysplastic alterations of the mucosa. Indication of "preventive" extirpation of the esophagus should be supported by other factors, for example by detection of p53 mutation or expression. The study reports on the evalua...
Barrett’s esophagus is well recognized as a premalignant condition leading to higher incidence of esophageal adenocarcinoma than the general population (Cameron, 1995; Katz, 1998; Solaymani-Dodaran, 2004). The risk of esophageal adenocarcinoma is approximately 30 times greater in patients with Barrett’s esophagus as compared with the general population (SolaymaniDodaran, 2004). Barrett’s esopha...
esophagus having different tissues has a special role in the gastrointestinal tract. among different species, layers of the esophagus, have a substantial difference. also, diameter of esophagus varies in different parts of it.the information of histological structure of rabbit and guinea pig esophagus is still incomplete. therefore, the present study was conducted. therefore, for review and com...
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