It was known that some of the abdominal tuberculosis can produce tumor-like appearance clinically and radiologically. But these were mainly masses formed in mesenteric and retroperitoneal lymphnodes. The author has experienced the gastrointestinal tuberculosis resembling to a neoplastic process. In the gastric tuberculosis, irreqular narrowing and filling defect with mucosal distortion and occasional shoulder effect could be seen in pyloric antrum. Deformity of proximal portion of duodenum was noted in most cases. Difficulty in differential diagnosis from the gastric cancer might be encountered, if duodenum was not involved. No definite sign of mucosal destruction in involved area and associated deformity of duodenum was suggestive of an inflammatory lesion. If there is any tuberculous changes in small bowel, then gastric tuberculosis is more likely. There was the tuberculosis of descending duodenum or pancreaticoduodenal group of lymph nodes revealed cancer-like appearance. L ng irregular narrowing with nodular filling defect and mucosal distortion or inverted 3 sign was evident. Differential diagnosis from cancer in duodenum or pancreas could not be made radiographically. Short annular stenosis and nodular filling defect with shoulder effect in both ends of stenosis was noted in some of the small bowel tuberculosis. The findings were very resemble to malignancy. There was a case of huge hepatoma-like tuberculosis formed a large irregular mass by lymph nodes and adjacent organs. Chest film was not much help in the differential diagnosis. In many cases of the gastrointestinal tuberculosis, radiological findings were resembled to a neoplastic process. Since none of radiologic findings are specific enough to allow one to make a definitive diagnosis of the gastrointestinal tuberculosis and since severe type of the gastrointestinal tuberculosis could be cured by chemotherapy, careful analyzation of clinical features is emphasized before surgery.