Abstract
A 17 years-old woman was admitted with upper abdominal pain and hematemesis. By endoscopic examination, Yamada IV type of protruded tumor (3cm in diameter) with an ulcer and hemorrhage from the ulcer were detected in the stomach. Endoscopic-ultrasonography revealed the muscular layer was intact with no invasion. The tumor was resected endoscopically using a detachable snare successfully.
The immunohistochemical staining of the tumor was positive only for S-100 protain, and the tumor was diagnosed as gastric schwannoma histologically.
In some cases, gastric schwannoma tend to have hemorrhagic ulcer. So such case was often found out by melena or hematemesis.
The cases of gastric schwannoma have been reported almost in middleaged or senior patients. The case of gastric schwannoma developed in a juvenile patient as this case was quite rare.
