Polyps that are 3 centimeters long are relatively large polyps, and usually a pedunculated polyp can be removed endoscopically, while a broad-based polyp is difficult to remove completely, and either way may lead to complications. A 3-cm-long pedunculated polyp can be endoscopically resected with endoscopic mucosal dissection, which is a segmental resection, but it can also lead to complications such as bleeding and perforation. In the case of broad-based polyps, endoscopic resection is more challenging. Because 3 cm long polyps are more likely to be malignant, even stripping resection can not guarantee complete resection to the malignant lesion site, resulting in the survival of cancer cells. At this time, you can cut part of the tissue for pathological examination under the condition of enteroscopy, but not necessarily cut the whole polyp. The next step in treatment will be decided after the pathology report is available. A 3 cm polyp is relatively large and can be completely removed endoscopically, but in severe cases it may lead to perforation and, in the case of malignancy, difficulty in removing it cleanly resulting in the retention of tumor cells. Regardless of the form of 3 cm polyps, samples should be taken for pathologic examination despite the difficulty in removing them cleanly under colonoscopic conditions.