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Small intestinal polyp
- ... the stomach) Stomach Duodenum (first part of your small intestine) A barium swallow test involves drinking a ... the throat , esophagus , stomach , and first part the small intestine. These conditions can include: Ulcers GERD (gastroesophageal ... Ulcers Tumors Polyps Diverticula, a condition in which small sacs form in the inner wall of the ...