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esophageal stricture
A benign esophageal stricture is a narrowing or tightening of the esophagus that causes swallowing difficulties.
==Causes==
It can be caused by or associated with gastroesophageal reflux disease, esophagitis, a dysfunctional lower esophageal sphincter, disordered motility, lye ingestion, or a hiatal hernia. Strictures can form after esophageal surgery and other treatments such as laser therapy or photodynamic therapy. While the area heals, a scar forms, causing the tissue to pull and tighten, leading to difficulty in swallowing.〔Ginex, Pamela K., Manjit S. Bains, Jacqueline Hanson, and Bart L. Frazzitta. 100 Questions & Answers About Esophageal Cancer (100 Questions & Answers). New York: Jones and Bartlett, Inc., 2005. Print.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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