Signs of right hemicolectomy cancer: anemia and abdominal pain Patients with right hemicolectomy cancer often present with abdominal masses, as well as anemia, abdominal pain, total weakness and weight loss. However, the stool habits of right hemicolectomy patients do not change significantly. However, the bleeding caused by the necrosis and shedding of cancerous tissues will not be easily detected by the naked eye because of the small peristalsis of the cecum and ascending colon, which makes the blood and the thin paste-like surimi evenly mixed. Such long-term chronic blood loss will cause anemia in patients, and at the same time, due to the growth of tumor, the body consumes a lot of nutrients, and patients will be accompanied by general symptoms of anemia such as weakness, emaciation, dizziness, and pallor. Anemia is one of the main symptoms for patients with right hemicolectomy cancer to seek medical treatment. At the same time, tumor invasion to the intestinal wall can cause hidden pain and even peri-enteritis, with pain gradually increasing and accompanied by obstruction symptoms. As the cancer increases, the right side of the abdomen gradually worsens, and even an abdominal mass can be felt. Abdominal pain is also one of the main symptoms for patients with right hemicolectomy to seek medical treatment. As a result, many patients only discover the cancer in their bodies accidentally when they visit the doctor because of anemia or abdominal pain. Fecal occult blood test is also often positive and may appear as the first symptom. Signs of left colon cancer: blood in stool and intestinal obstruction Patients with left colon cancer discover their disease early on themselves. Blood in the stool (blood in the stool) is the most common symptom, accounting for about 75% of cases. This is because when the surimi enters the left colon from the right hemicolectomy, the water is reabsorbed and the surimi gradually becomes solid stool, which is hard and can easily bleed due to friction with the cancerous tissue. The blood in stool visible to the naked eye will alert patients and prompt them to seek medical treatment in time. Mucus stool or mucus-purulent stool may also appear. At the same time, it is difficult for dry and formed stool to pass through the cancer site, and intestinal obstruction may easily occur. This is like the deposition of layer after layer of thick dirt on the inner wall of water pipes, blocking the flow of water. For this reason, intestinal obstruction can also be understood as “pipe blockage”. Sign of rectal cancer: change of bowel habits and stool shape Due to the stimulation of the intestinal tract by cancer, the main manifestation is the increase of stool frequency from once a day to several times a day, or even as many as ten or tens of times a day, with only a small amount of blood and mucus stool each time, accompanied by persistent anal swelling and the feeling of incomplete defecation; or once every few days. The stool becomes thin and deformed: from the original cylindrical shape to the middle of the stool with a hook-like shape. These are the typical symptoms of rectal cancer. Blood in the stool is also the most common symptom of rectal cancer patients. Blood in the stool is mostly bright red or dark red, and it is rare to have patients with heavy bleeding, sometimes the blood in the stool contains mucus, blood clots and detached necrotic tissue. Signs of anal cancer: bleeding and pain Bleeding and pain are the main signs of anal cancer. Solid stool, which is hard, can easily rub against cancerous tissues and cause bleeding, and the blood is bright red and does not mix with stool. Anal cancer can invade nerve tissues at an early stage and cause pain, especially when defecating. Patients have fear of defecation, so it is easy to cause constipation.