Wide-base polyp 5mm is cut out first, then pathologic biopsy is performed, and the next step is taken according to the situation. Wide-base polyp is a type of polyp, which is mainly characterized by a thicker base of the polyp and a wider connection with the contact area, so it is called wide-base polyp. Generally this type of polyp has a relatively high likelihood of malignancy, so it should be handled carefully. The main thing to do is to determine the nature of the polyp, whether it is a tumor or not, and whether it is malignant or not. For example, if the polyp is broad-based 5mm, it should be excised microscopically first, and then the excised tissue should be biopsied for pathology. If it is a non-tumor or benign tumor, then surgical excision will be sufficient; if it is malignant, it should be treated according to the treatment of malignant tumors, such as radiotherapy and chemotherapy. It is recommended to take a serious view of this matter, clarify the situation and then proceed to the next step, if unfortunately it is a tumor, it can also be treated as early as possible to reduce the harm.