Evaluation of Colorectal neoplasia(s) incidence in Bariatric Surgery Candidates

Interventions: Colonoscopy will be performed to the patients who will be included in the study. All procedures will be held by the same team who contributes to this trial. Bowel cleansing will be achieved by polyethyleneglycol or a phosphate-based solution depending on the renal function. Colonoscopy will be performed under general anesthesia and 1-2 mg/kg propofol following premedication with midazolam 0.05 mg/kg and fentanyl 1 µg/kg. The procedure takes about 20 minutes. All polyps will be resected utilizing forceps or snares and will be sent for patholological examination. The same two pathologists will be responsible for the histologic examination. Polyp size will be measured in the laboratory and also colonoscopically, by comparison with a 6-mm forceps. Location of polyps will be recorded as proximal or distal with respect to the splenic flexure. Multiple polyps in both proximal and distal colon will be evaluated in diffuse category.
Primary outcome(s): Colorectal neoplasia incidence between different age groups.
Colorectal neoplasia will be assessed with the histopathologic evaluation of polyps. [2 years, post enrolment];Colorectal cancer incidence between different age groups
Colorectal cancer diagnosis will be assessed with histopathologic examination of the polypectomy specimen.[2 years, post enrolment.]
Study Design: Purpose: Prevention; Allocation: Non-randomised trial