The pathological typing of early colon cancer includes: 1. Type I augmented polyp type, in which the tumor is obviously elevated toward the lumen, which can be further divided into two subtypes: tipped and non-tipped; 2. Type II superficial type is further divided into three subtypes. The flat elevated type, type IIA, has a coin-shaped appearance and is slightly higher than the surrounding mucosa, but not more than twice the thickness of the mucosa. Type IIB, flat type, the lesion is neither higher nor depressed, and is basically level with the surrounding mucosa; Type IIC, depressed type, the lesion is potentially concave, and this type is extremely easy to penetrate the mucosa. Progressive colon cancer pathological typing: 1, mass-type tumor is nodular, polyp-like or cauliflower-like, growing into the intestinal cavity with clear boundary, preferably in the right colon, especially the cecum; 2, infiltrative type, infiltrating along the intestinal wall, resulting in obvious thickening of the intestinal wall, narrowing of the intestinal cavity, rigidity, easily causing intestinal stenosis and intestinal obstruction, without obvious ulceration or convex masses mostly in the left colon; 3, ulcerative type, which is characterized by growing deeper into the It is a common type of colon cancer, characterized by deep growth to the intestinal wall and infiltration to the surrounding, with obvious and deep ulcer formation in the center of the tumor.