Twenty patients with villous adenoma of the large bowel were reviewed to reevaluate the radiologic findingsand to correlate histologic and radiologic feature. Preoperatively, 8 cases were correctly diagnosed by the doublecontrast barium study(40%). Other radiologic diagnosis included carcinoma in 6 cases(30%), mass in 3 cases(15%) and polyp in 2 cases(10%) respectively. The main radiologic findings of villous adenoma wre sessile growth(55%) with reticular surface(70%), and involved the rectosgnoid colon in 95% of the cases. The unusual feature ofvillous adenoma were annular form which mimic annular carcinoma. Malignant transformation occured in 8 cases(40%).The size of villlous adenoma with malignant trasformation were bigger than benign form. No malignant change wereobserved in adenoma with pedicle or nodular surface pattern. If the tumor has more villous component on histologicexamination, the surface pattern became more villous and the gross feature became more sessile and annular onradiologic finding and the tendency of malignant change was increased. We concluded that as villous adenoma hasdistinctive gross pathologic finding, better understanding of the radiologic finding will improve the diagnostic accuracy. Also the prediction of villous component and malignant potential with double contrast study will contribute to determine the treatment plan.