The clinical manifestations of patients with right hemicolectasis include the following five aspects: 1. Irritating symptoms of bowel and change of bowel habits: constipation, diarrhea, alternating constipation and diarrhea, feeling of incomplete defecation, anal swelling, abdominal pain, etc. 2. Blood in stool: blood in stool is caused by tumor breaking and bleeding, sometimes it is bright red, sometimes it is dark red blood, usually the amount of bleeding is not much and it occurs intermittently. 3. 3.Intestinal obstruction: Intestinal obstruction is one of the manifestations of advanced stage of intestinal cancer. 4.Abdominal mass: Because the tumor has grown to a certain extent, a mass can be found in the abdomen, and the abdominal mass, especially the right hemicolectomy, is most common, especially in elderly patients who are usually thin and have a loose abdominal wall, so the mass is more easily found. 5.Systemic toxic symptoms: including anemia, emaciation, fever, general weakness, secondary infection, etc. secondary infection, etc.