Adenomatous polyps of large intestine. The screening scheme for patients with colorectal adenomatous polyps found in previous examinations depends on the size, number and pathology of colorectal adenomatous polyps.
Federal Colorectal Cancer collaboration Group:1 multiple polyps (> 3) or high-grade polyps were reexamined by colonoscopy within 3 years.(2) 1 to 2 small tubular adenomas were found (< 1cm), and total colonoscopy was reexamined within 5 years.ASGE:112small tubular adenomas with low-grade atypical hyperplasia (< 1cm), which can be reexamined by colonoscopy up to 5 years later.2 patients with high-grade adenomatous lesions or more than 3 (including 3) polyps were followed up by colonoscopy every 3 years until all visible polyps were removed.Patients with more than 10 polyps, unsuccessful colonoscopy and unsatisfactory preparation before colonoscopy need to be followed up within a shorter period of time. If the follow-up is negative, a second follow-up can be carried out within 5 years.4 large sessile polyps must be reexamined 2-6 months after resection.NCCN:1 No more than 3 small tubular adenomas (< 1em) were reexamined by total colonoscopy within 3-6 years. If negative, follow-up with total colonoscopy was performed every 5 years.2 under the following circumstances, complete colonoscopy should be reexamined within 3 years, if normal, once every 3-5 years, including: a. High grade atypical hyperplasia or carcinoma in situ, b. The diameter of adenoma is more than 1 cm. Villous adenoma (villous components account for more than 25%), d. Multiple adenomas of any size (> 3).(3) if the polyps were not completely removed in the first total colonoscopy, the polyps should be reexamined within 3 to 6 months according to pathology. NCCN-specific screening strategy for colorectal cancer in patients with endometrial or ovarian cancer: it is recommended that patients take a full colonoscopy every 5 years from the diagnosis of endometrial cancer (or 40 years old).
