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barium test
x-ray examination using a barium mixture to help locate disorders in the esophagus, stomach, and small and large intestines. Such conditions as peptic ulcer, benign or malignant tumors, colitis, or enlargement of organs that might be causing pressure on the stomach may be readily identified with the use of barium tests. Common tests are the barium enema and the barium meal or gastrointestinal series.

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