食管扩张是什么原因引起的
http://zhidao.baidu.com/question/431732538649505932.html?fr=iks&word=%CA%B3%B9%DC%C0%A9%D5%C5%D6%B8%B5%C4%CA%C7%D4%DACT%BB%F2%D5%DF%CA%C7X%CF%DF%CF%C2%CA%B3%B9%DC%B5%C4%D6%B1%BE%B6%B3%AC%B9%FD%D5%FD%B3%A3%B5%C4%B2%CE%BF%BC%D6%B5%B7%B6%CE%A7.%D2%BB%B0%E3%B3%A3%BC%FB%B5%C4%D2%FD%C6%F0%CA%B3%B9%DC%C0%A9%D5%C5%B5%C4%BC%B2%B2%A1%CE%AA%CA%B3%B9%DC%CF%C2%B6%CE%BB%F2%D5%DF%CA%C7%EA%DA%C3%C5%B4%A6%CF%E0%B9%D8%B5%C4%BC%B2%B2%A1%2C%B1%C8%C8%E7%CA%B3%B9%DC%B5%C4%D6%D8%B6%C8%B5%C4%D1%D7%D6%A2%2C%C0%A3%D1%F1%D2%FD%C6%F0%CA%B3%B9%DC%B9%DC%B1%DA%D4%F6%BA%F1%2C%BB%F2%D5%DF%CA%C7%CA%B3%B9%DC%B0%A9%CF%F2%C7%BB%C4%DA%C9%FA%B3%A4%D2%FD%C6%F0%B5%C4%B9%A3&ie=gbk ——百度知道
-
答：食管扩张分为广泛性扩张和限局性扩张；1、广泛性扩张又称先天性扩张，发病原因不明，食管神经肌肉功能障碍引起全段食管扩张2、限局性扩张：膨出性憩室常因食管壁平滑肌层先天发育不良，表面的粘膜部分由该处