Pharmacology and histopathology of the cardiac sphincter in achalasia.
D002299:Cardia / Q000503:physiopathology; D004931:Esophageal Achalasia / Q000503:physiopathology*; D004943:Esophagogastric Junction / Q000294:innervation / Q000473:pathology / Q000503:physiopathology*; D005725:Ganglia, Autonomic; D006801:Humans; D066298:In Vitro Techniques; D009130:Muscle, Smooth / Q000473:pathology; D009197:Myenteric Plexus / Q000473:pathology