<radiology> Achalasia, Chagas disease, idiopathic pseudo-obstruction, amyloidosis, Ehlers-Danlos syndrome, presbyesophagus (uncommon), oesophageal dysmotility (usually mild to moderate dilatation) ... (12 Dec 1998) ... 
(meg″ә-lo-ә-sof´ә-gәs) megaesophagus.