Abstract:Endoscopic ultrasonography (EUS) was performed in 32 patients with ulcerative colitis. The EUS findings were classified into 5 types based on our criteria. The relationship between the type of EUS finding and clinical severity, endoscopic grading, extent of disease, and therapeutic measures were examined. The type of EUS finding tended to correlate with both the clinical severity and endoscopic grading. There was also a correlation between the extent of the disease and the EUS findings. Therapeutic measures differed according to the type of EUS finding. Consequently, EUS was considered to be useful for the objective assessment and grading of the disease and for predicting prognosis. (Dig Endoc 1994; 6 : 3–