Also found in: Dictionary, Encyclopedia.
functional obstruction at the level of the upper esophageal sphincter due to failure of relaxation of the cricopharyngeal muscle; often associated with a pharyngoesophageal diverticulum.
cri·co·pha·ryn·ge·al a·cha·la·sia(krī'kō-făr-in'jē-ăl ak-ă-lā'zē-ă)
Failure of the lower pharyngeal muscles to relax during swallowing. The condition may cause dysphagia or aspiration of food or gastric contents.
See also: achalasia