*Any cause of '''prolonged oesophageal obstruction''' may result in megaoesophagus which eventually becomes irreversible if the underlying cause is not removed. Examples include [[Oesophageal Foreign Body|foreign bodies]], [[Oesophageal Neoplasia|neoplasia]] and [[Oesophageal Stricture|strictures]]. | *Any cause of '''prolonged oesophageal obstruction''' may result in megaoesophagus which eventually becomes irreversible if the underlying cause is not removed. Examples include [[Oesophageal Foreign Body|foreign bodies]], [[Oesophageal Neoplasia|neoplasia]] and [[Oesophageal Stricture|strictures]]. |