Symptoms of colorectal cancer, no obvious symptoms of early colorectal cancer, the disease develops to a certain degree of clinical symptoms emerge, the main performance of the following five areas:
(1) stimulate intestinal symptoms and bowel habits: they frequent, diarrhea or constipation, sometimes alternating constipation and diarrhea, tenesmus, rectal bulge, and often abdominal pain. Elderly patients unresponsive, insensitive to pain, and sometimes cancer has occurred perforation, peritonitis, abdominal pain and medical treatment was sleep.
(2) blood in the stool: tumor rupture bleeding, sometimes bright red or dark, usually small amount of bleeding, intermittent. If the higher location of the tumor, blood is mixed with the stool was jam-like stool. Sometimes bloody mucus.
(3) abdominal mass: the tumor grows to a certain extent, can be palpable abdominal mass, often to the right half of colon cancer more common. More weight loss in elderly patients, and the more relaxed abdominal wall, the mass is easily palpable. The initial mass can be driven around the fixed after the invasion.
(4) intestinal obstruction: obstruction of colon cancer with advanced performance. More common in the left colon obstruction. Ulcerative or proliferative invasion of colon cancer spread to the surrounding wall due to obstruction caused by intestinal stenosis, often with chronic incomplete mechanical intestinal obstruction. The first onset of abdominal distension, abdominal discomfort, and paroxysmal abdominal pain, bowel Music hyperthyroidism, constipation or stool thinning (pencil-like, sheep-like) that exhaust defecation stopped. The more acute intestinal obstruction caused by the invasive colon cancer, the tumor is causing intussusception, obstruction of a lot of elderly patients, so the elderly to be wary of intussusception of colon cancer possible. Both acute and chronic intestinal obstruction, nausea and vomiting are not obvious, if vomiting, then the small intestine (especially the high small intestine) may have been affected by tumor invasion.
(5) anemia, weight loss, fever, weakness and other symptoms of systemic poisoning: As the body of tumor growth in consumption of nutrients, the long-term – patients with anemia caused by chronic bleeding; tumor secondary infection, causing fever and symptoms of poisoning.
The left and right colon in the embryology, anatomy, physiological function and pathological basis is different, so after the two tumors are different clinical manifestations.
The contents of the left colon intestine water is absorbed by the right colon, the stool into a fixed state; the left than the right side of the large intestine lumen narrow, and the left colon tumor infiltrating common histological type, prone to cause intestinal stricture, stool through the difficulties, so the right side of obstructive colorectal cancer than the more common symptoms. Left colon bleeding, the blood rapidly excreted along with feces, blood, the patient will be easily detectable. Right side of the colon lumen is relatively large, luminal contents of the fluid state, not easy to produce intestinal obstruction; tumor hemorrhage, blood mixed with the intestinal contents, such as the small amount of bleeding, the patient difficult to detect, chronic blood loss can lead to anemia; right colon cancer tumor protruded more common histological type, tumor growth in the intestinal lumen formation
Clinical examination palpable abdominal mass; and more powerful the right side of the absorption of the colon, tumor necrosis due to infection, the bacteria produce toxins are absorbed, the clinical symptoms of poisoning can occur.
Colon cancer symptoms, symptoms of rectal cancer to blood and change in bowel habits (stool frequency increased, tenesmus, dirty door bulge, etc.) more common. When rectal stenosis caused by tumor infiltrating the intestinal wall, can occur stool deformation, thinning, such as the continued development of the disease, intestinal obstruction can occur. The frequency of clinical manifestations, and right colon followed by abdominal mass, abdominal pain and anemia, the most common; left turn to the blood of colon cancer, abdominal pain and the frequency of the most common; cancer turn to blood, and stool frequency distortion will be more common. Left and right colon cancer causes of differences in clinical manifestations.