Bleeding in the stool, beware of colorectal cancer

Many people still don’t know or don’t know much about colorectal cancer, so what is the relationship between blood in the stool and colorectal cancer? Many people get scared when they see blood in their stool, wondering if this is a precursor to colorectal cancer? With this question, we asked the experts from Beijing Cancer Hospital to give us a detailed answer. The color of blood in the stool first depends on the height of the bleeding site. When the esophagus, stomach, duodenum and other upper digestive tracts, as well as the liver, bile duct, and pancreas bleed, the stools are mostly brown or tarry. When the small intestine, colon, rectum, anal canal and other lower digestive tracts bleed, the stools are mostly dark red or bright red. However, the color of bloody stools is also related to the amount of bleeding and the rate of discharge. When acute upper gastrointestinal bleeding is accompanied by increased intestinal peristalsis. And small intestinal bleeding, if it stays in the intestine for a long time, tarry black stools can also be discharged.

Hemorrhoids are especially rare in elderly men. Painless intermittent fresh blood after defecation is a rare symptom of internal hemorrhoids in the early stage. The most common causes of blood in the stool are: Hemorrhoids. There is a saying among the people that "nine out of ten people have hemorrhoids". Because feces rub the hemorrhoidal mucosa, there will be blood dripping in the stool or blood on toilet paper. A few bleed in the form of jets, which can stop on their own.

Most of the bleeding is intermittent and the amount of bleeding is small. Colon polyps may become cancerous. Colon polyps have blood in the stool similar to hemorrhoids. So it should not be ignored.

During defecation, a small amount of blood is often seen on the surface of the stool or toilet paper. Anal fissures can also cause bloody stools or dripping blood, but anal fissures often have typical manifestations, namely pain around the anus, constipation and bleeding, and the pain is more severe and periodic.

Colorectal cancer is the fourth most common malignant tumor. In 2002, there were about 1 million cases of colorectal cancer worldwide, and 530,000 deaths from colorectal cancer worldwide. In the past 20 years, the incidence of colorectal cancer in my country has been on the rise. According to a survey in 2004, the incidence of colorectal cancer in major cities such as Beijing and Shanghai has risen to the second or third place in digestive tract tumors. According to statistics, more than 70% of colorectal cancer patients have blood in their stools, which is represented by dark red blood in the stool, or mucous pus and blood in the stool, or blood mixed with stool. Adults who have blood in the stool, accompanied by lower abdominal distension or anemia and weight loss should be alert to colorectal cancer. According to relevant data analysis, more than half of colorectal cancers in the country are located in the rectum, which is about 15 cm long, and 65%-75% of rectal cancers occur in the lower 2/3. Generally, a simple "digital rectal examination" can be found in time. In addition, it is worth noting that rectal cancer may coexist with hemorrhoids. Therefore, we should pay enough attention to blood in the stool. In order to detect colon and rectal cancer in time, we must perform "digital rectal examination" and perform full colon examination by sigmoidoscopy or fiber colonoscopy when necessary. Unfortunately, at present, 50% of patients are not diagnosed in time because of blood in the stool of rectal cancer, and the delay is half a year, and the delay is 70% for 3 months. Only less than 10% of patients are diagnosed and treated in time. Rectal cancer is divided into three stages: early, middle and late. The 5-year survival rate of early patients after treatment can reach 90%-100%, the middle stage can reach 40%-60%, and the late stage can only be less than 20%. Therefore, early detection, early diagnosis and early treatment of rectal cancer are very important.

Ulcerative colitis Ulcerative colitis often causes chronic diarrhea. The stool is mucous, purulent and bloody, accompanied by abdominal pain and fever. The diagnosis can be confirmed by fiber colonoscopy. The incidence of colorectal cancer in patients with ulcerative colitis is 510 times that of the normal population, and the malignancy level is high, so early diagnosis and early treatment are also required.

Food poisoning, bacterial dysentery, amoebic dysentery, blood disease, vitamin C and K deficiency, epidemic hemorrhagic fever, allergic purpura, intussusception in children, etc. can also cause blood in the stool. Blood in the stool is often a signal of many diseases. In short, it includes the digestive system and the whole body.

A considerable number of people with blood in the stool are colorectal cancer patients, and diseases of other systems can also cause blood in the stool. It is extremely harmful to people, so any form of blood in the stool should be treated as soon as possible. Perhaps a simple "digital rectal examination" can make a clear diagnosis, and surgical treatment can be performed as soon as possible to save precious lives.

The above is what experts have told us about colorectal cancer. Expert tips: If you have symptoms of disease, do not delay diagnosis and go to a regular hospital for treatment in time to avoid delaying the disease and causing serious consequences. If you have other questions, please consult our online experts or call for consultation. I wish you health and happiness!

Colorectal cancer http://www..com.cn/zhongliu/dca/