1993 Volume 43 Pages 112-115
Endoscopically resected epithelial neoplastic lesions were studied to evaluate the carcinomatous change in them. Subjects were more than 10mm in size and more than 5mm in height. Histologically, they were 51 adenoma and 42 carcinoma with adenoma component. The latter were devided by the carcinoma area among the lesion in the maximal cut surface ; small (less than 10%) 17, medium (30-70%) 15, and large (more than 90%) 5 lesions. Remaining 5 lesions were already invaded into the submucosal layer (Table 1) .
Macroscopically, sessile, and broad-based configuration suggested large amounts of carcinoma area of submucosal invasion (Table 2) . Concerning the head of the lesions, unusual shape revealed further involvement by carcinoma while spherical one showed adenoma or small amount of carcinoma (Table 3) . Asymmetric or manifested the high possibility of malignancy (Table 4) . The size and hyperemia however, did not correlate the amount of carcinoma (Table 5, 6) .
