Abstract: Objective To study the clinical and pathological feature of colorectal adenoma with canceration. Methods A study of 185 senile patients with collorectal adenoma was undertaken.The relation between colorectal adenoma and its malignant potential was observed. Results The malignant potential of elderly colorectal adenoma is associated with the factors of the site,shape,number of adenoma,histolocal type and age.There was no relationship between sex and canceration. Conclusion It is easily cancerative in elderly colorectal adenoma.The whole tumor should be removed in suspicious malignant adenoma.Close and regular follow-up should be done after recection.