Achalasia of the cricopharyngeus.
D003679:Deglutition; D003680:Deglutition Disorders / Q000209:etiology*; D004194:Disease; D004931:Esophageal Achalasia; D006801:Humans; D007817:Laryngeal Cartilages; D007818:Laryngeal Diseases; D010609:Pharyngeal Muscles
DEGLUTITION DISORDERS/etiology and pathogenesis; LARYNGEAL CARTILAGES/diseases