Rectal polyp base without tip, mainly refers to the colonoscopy found rectal polyp is broad-based polyp, and intestinal wall without tip connection. Polyp base without tip, mainly found through colonoscopy, for such polyps, its large area attached to the intestinal wall, polyp base is wider, and the surrounding mucosa demarcation is not clear, generally do not choose the colonoscopy ligation, extraction way, this way to remove polyps is not complete, easy to induce recurrence or malignant change of the polyps, for this type of polyps are generally more choice of surgical resection or submucosal resection, to minimize the possibility of recurrence and malignant change. In addition, after the operation, we must take the polyp for pathology, according to the pathological results of the exact nature of the lesion, so as to avoid misdiagnosis and delayed treatment.