title: Reflux of barium into a maxillary antrum.
abstract: A patient with achalasia and neurologic deficit permitting intermittent nasopharyngeal reflux developed unilateral maxillary sinusitis. Heavy metal density in the center of the inflamed sinus almost certainly was barium sulfate refluxed during an upper gastrointestinal study.
mesh_terms: D001466:Barium Sulfate; D003937:Diagnosis, Differential; D004931:Esophageal Achalasia / Q000503:physiopathology; D006801:Humans; D001239:Inhalation; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging; D008875:Middle Aged; D011859:Radiography; D012852:Sinusitis / Q000000981:diagnostic imaging / Q000209:etiology
chemical_list: D001466:Barium Sulfate