Rectal polyps with a broad base are not necessarily Yamada type II, but may also be Yamada type I, etc. The specific diagnosis needs to be judged according to the endoscopic performance of the polyp. 1. Yamada type 1: these polyps are non-tibial, hemispherical, often flattened broad-based bulge, polyps with gentle edges, and the intestinal mucosa between the angle >90 °, the color is similar to the surrounding colonic mucosa or slightly reddish, the diameter of the general in about 0.1-0.3cm. 2. Yamada type 2: these polyps subtypes, hemispherical, often spherical wide base elevated, the edge of the polyp is steeper and straighter, and the intestinal mucosa between the angle <90 °, the surface of the reddish, the center may have depression. Whether Yamada type I or Yamada type II polyps, endoscopy is generally required to carry out pathologic examination, clear pathologic type after targeted treatment. Please consult the hospital in time and standardize the diagnosis and treatment to avoid delaying the condition when you find wide base rectal polyps.