In the present study, patients with gastrointestinal tumor were examined by using GI barium examination, CT(computed tomography), MRI(magnetic resonnance imaging).

We summarized 16 cases of nonfunctioning islet cell tumor which were proved by surgery and pathology after CT and hypotonic barium meal examination of gastrointestinal tract.

Conclusion:Gastrointestinal barium meal examination plays an important role in screening polyps(especially intestinal polyps)and it can also provide noninvasive measures for regular follow-up.