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...[List of ICD-9 codes 520–579: diseases of the digestive system#Diseases of esophagus, stomach, and duodenum (530–537)|530–579]]) [http://en.wikipedia.org/wi |group1= [[Esophageal disease|Esophagus]]

...= X-ray showing radiocontrast agent injected into the stomach entering the esophagus due to severe reflux