title: Oesophageal pressure studies in the diagnosis of achalasia.
mesh_terms: D004931:Esophageal Achalasia / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004947:Esophagus / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry; D011859:Radiography