Air in the esophagus as a sign of scleroderma (differential diagnosis with some other entities).
D003937:Diagnosis, Differential; D004931:Esophageal Achalasia / Q000000981:diagnostic imaging; D004935:Esophageal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging; D011859:Radiography; D012595:Scleroderma, Systemic / Q000000981:diagnostic imaging*; D013270:Stomach / Q000000981:diagnostic imaging; D014132:Trachea / Q000000981:diagnostic imaging