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Esophageal webs are thin membranes located in the middle or upper esophagus. ==Presentation== Its main symptoms are pain and difficulty in swallowing (dysphagia). Esophageal webs are thin (2-3mm) membranes of normal esophageal tissue consisting of mucosa and submucosa that can partially protrude/obstruct the esophagus. They can be congenital or acquired. Congenital webs commonly appear in the middle and inferior third of the esophagus, and they are more likely to be circumferential with a central or eccentric orifice. Acquired webs are much more common than congenital webs and typically appear in the cervical area (postcricoid). Clinical symptoms of this condition are selective (solid more than liquids) dysphagia, thoracic pain, nasopharyngeal reflux, aspiration, perforation and food impaction (the last two are very rare). file:Zervikales Web.jpg|Esophageal web stenosis in barium swallow examination lateral view. file:Web mit Jet-Phaenomen.jpg|Web with "jet-phenomenon". Arrowhead on incomplete opening of the upper esophageal sphincter. file:Zervikales Web pa.jpg|Esophageal web stenosis in barium swallow examination frontal view. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Esophageal web」の詳細全文を読む スポンサード リンク
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