Abstract: Objective To compare the diagnostic value between CT and ultrasound examination in acute-ileus caused by colonic carcinoma.Methods The results with 42 cases between acute-ileus caused by colonic carcinoma were analyzed retrospectively.Results In 42 cases of acute-ileus caused by colonic carcinoma,the ultrasound examination shoed 29 cases of celiac effusion,16 cases of celiac mass,only 5 cases suggested the mass related to colon,no ileus diagnosed.CT shoed all cases with ileus sign,20 cases mass in ascending colon,5 cases in right flexure of colon,4 cases in transverse colon,5 cases in left flexure of colon,8 cases in descending colon.Conclusion CT was more sensitive and accurate in diagnoses of acute-ileus caused by colonic carcinoma.

Key words: colonic carcinoma, ileus, CT, ultrasounograph