Intestinal glandular ductal openings type IIIL are generally suggestive of tubular adenomas. Kudo typing of intestinal polyps is mainly divided into types I, III, III, IV, and V. Types I and II are non-neoplastic glandular ductal openings, which are mainly found in normal colorectal mucosa, inflammatory polyps, and hyperplastic tumors; types III (subtype IIIs and IIIL), IV, and V are neoplastic glandular ductal openings, of which intestinal glandular ductal opening type IIIL is generally suggestive of tubular adenoma. Treatment of tubular adenomas is based on surgical resection. The resection consists of two modalities, one is colonic endoscopic resection, which is suitable for adenomas of small size. And the other is laparoscopic surgery, which is suitable for adenomas that are large and cannot be removed endoscopically. In the case of intestinal adenomatous duct opening type IIIL, you should visit the hospital in time for proper treatment under the guidance of your doctor.