Both advanced and nonadvanced adenomas are most frequent in male older than 50. According to their endoscopic appearance, advanced adenomas can be recognized even during the colonoscopy, and differed from the nonadvanced ones. The most frequent distal localization of advanced adenomas indicates that they can be initially diagnosed even with rectosigmoidoscopy. However, considering the fact that there is a significant number of patients without distal, but only with proximal tumors, colonoscopy is the method of choice for the diagnosis of all colorectal adenomas. This refers particularly to those patients with nonobstructive CRC who are planned for surgical intervention. Preoperative colonoscopy detects possible synchronous CRC in early postoperative period, prevents the malignant transformation of adenomas and improves long-standing wellbeing of the patients. [Acta Inform Med 2008; 16(4.000): 203-209]

adenomas, colonoscopy, surgery