In my country, colorectal cancer is one of the most common malignant tumors. The latest statistics show that the incidence of colorectal cancer is 29.44/100,000 and the mortality rate is 14.23/100,000, ranking third and fifth among malignant tumors, respectively, and showing an upward trend year by year. Colorectal cancer patients often have no signs at the onset of the disease, but when they are discovered, they have often entered the helpless stage of "no way out". In clinical practice, it is often seen that some people may only have changes in bowel habits, such as people with long-term constipation suddenly have diarrhea, or blood in the stool, and go to the hospital to see a doctor, only to find that they have colorectal cancer. Literature statistics show that the 5-year survival rate of early-stage colorectal cancer after treatment can reach more than 90%; the 5-year survival rate of mid-stage colorectal cancer is 50% to 70%; and the 5-year survival rate of late-stage colorectal cancer is less than 10%. Therefore, the earlier colorectal cancer is discovered, the better the prognosis. If you want to catch the "clues" of early colorectal cancer in time, colonoscopy should be given priority. 1. Identifying colorectal cancer with “eagle eyes and golden eyes” Before a colonoscopy, patients need to prepare in advance, that is, clean their intestines. When their intestinal excrement is close to clear water, the endoscopist will insert a hose with a camera into the patient's anus, observe the morphology of the intestinal mucosa under the endoscope, and carefully look for traces of cancer cells. If the doctor suspects that a lesion may become cancerous, he will use biopsy forceps to obtain the tissue there and send it to the pathology department for further examination. With the rapid development of endoscopic technology, more advanced equipment such as magnifying endoscopes, confocal endoscopes, and ultrasound endoscopes are now available for doctors to use. Among them, magnifying endoscopes can observe the openings of local mucosal gland ducts, which can approach or achieve the effect of non-invasive pathological diagnosis. Ultrasound endoscopes can determine the depth of cancer cell infiltration. For example, if the cancer cells of early colorectal cancer are judged to occur only in the surface layer of the intestinal mucosa under endoscopy, mucosal resection can also be performed directly under endoscopy to achieve a radical cure. 2. Do not tolerate polyps if they are found When it comes to colorectal cancer, we have to talk about polyps. A large number of research results have confirmed that polyps are a high-risk factor for cancer. The polyps mentioned here are adenomatous polyps. According to the morphology of the glandular ducts of adenomatous polyps, they are divided into tubular, villous, or a mixture of the two. The higher the proportion of villous polyps or villous components in polyps, the higher the risk of cancer. The larger the diameter of the polyp, the greater the risk of cancer. 3. High-risk groups need to undergo colonoscopy regularly It is recommended that the following groups be listed as high-risk groups for colorectal cancer: Positive stool occult blood; first-degree relative has a history of colorectal cancer; previous history of intestinal adenoma; personal history of cancer and changes in bowel habits. In addition, people who meet any two of the following conditions (chronic diarrhea, chronic constipation, mucus and blood in stool, chronic appendicitis or history of appendectomy, chronic cholecystitis or history of cholecystectomy, long-term mental depression) are at high risk of colorectal cancer and need regular check-ups. |
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