Achalasia and absent gastric air bubble.
D000388:Air; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging*; D004943:Esophagogastric Junction / Q000503:physiopathology; D006801:Humans; D011312:Pressure; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging*