These form a small proportion of all <span style = 'background-color: #dae8f4'>COLON</span>ic
polyps. Doctors remove adenomas because some of them may progress to COLON
It is difficult to tell by external appearance whether a polyp is an adenoma. The diagnosis is made by microscopic appearance. The majority of adenomas are benign and the very act of removing them during COLON
oscopy is sufficient to eliminate the risk of cancer developing in that polyp. Only a very small number of cases need surgery.