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For the doctor to get a clear view through the endoscope , the stomach needs to be empty.
There seems to be an unavoidable degree of trauma to both sites despite the surgeon using an endoscope .
If an object appears clear when viewed through the endoscope, the endoscope is deemed satisfactory.
If the doctor sees abnormal looking tissue, he or she can insert instruments through the endoscope to remove sample tissue.
One of the main reasons for performing endoscopy in patients with this problem is to detect underlying ulcer disease.
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