Abstract
In 49 patients who were diagnosed as suspicion of submucosal tumor in digestive tract, the usefulness of endoscopic ultrasonography (EUS) in diagnosis of submucosal tumors was evaluated from three viewpoints, that is, differential diagnosis from extramural compression by the proximal organs and submucosal tumor, qualitative diagnosis of submucosal tumor and differential diagnosis between benignancy and malignancy. EUS equipped with the radial scanning type of Olympus make was used. It was possible to make differential diagnosis for extramural in all cases. Qualitative diagnosis among submucosal myogenic tumor, hemangioma, lipoma and cyst was possible to assess internal echo level and wall site of occurrence. Differential diagnosis of myogenic tuomr between benignancy and malignancy was impossible. Based on summarised data EUS and histopathological findings obtained from 18 surgical cases of myogenic tumor, it was recommended that surgical treatment should be considered by suspecting sarcoma if three of four findings such as more than 30mm of tumor diameter, asymmetrical margin, uneven internal echo and/or echo free area were obtained.
