Colonoscopy is the most important method for early detection of colorectal cancer. The benefits of a colonoscopy are often beyond your expectations.
95% of bowel cancers evolve from colon polyps, and it usually takes 15-20 years for intestinal polyps to develop from benign to malignant. If it can be detected early, the cure rate can reach more than 90% after resection with colonoscopy.
Another great advantage of colonoscopy is that once polyps or small tumors are found in the intestine, they can either be removed immediately or a biopsy can be taken by the way. A large number of studies have shown that the sensitivity of colonoscopy screening is as high as 90%.
Lancet: One colonoscopy can reduce the risk of bowel cancer by 30% in 17 years!
Recently, the well-known clinical medicine journal The Lancet published a new study that a bowel cancer screening test can reduce the risk of bowel cancer by more than one-third and save countless lives.
This research lasted nearly 20 years and was funded by many research institutions in the UK. Studies have found that examining the lower part of the large intestine can prevent 35% of bowel cancers that occur in this area and save 41% of the lives of patients.
The study followed more than 170,000 people, with an average follow-up time of more than 17 years, of which more than 40,000 people underwent colonoscopy. This is the longest study on whether colonoscopy can effectively prevent bowel cancer.
Screening with colonoscopy can find small polyps on the intestinal wall. If left untreated, polyps may become cancerous. Finding and removing polyps during colonoscopy can prevent it from developing into cancer.
Professor Wendy Atkin, an intestinal screening expert from the Cancer Institute UK and the first author of the article, said: “We know that bowel screening is of great benefit to the elderly. Although no screening is perfect, this A study shows that colonoscopy can effectively reduce cancer deaths for at least 17 years. Bowel cancer can be prevented, and screening for bowel cancer with colonoscopy is a good way to reduce bowel cancer, so in conditions Next, you should not miss such a good opportunity to check your intestines.
Annals of Internal Medicine: A colonoscopy can reduce the risk of cancer by up to 72%
Doctors believe that if detected early, bowel cancer is the most curable cancer. A large study recently published in the Annals of Internal Medicine has also confirmed this-colonoscopy can save lives.
The study observed approximately 25,000 patients. Colonoscopy is commonly used in their medical system and is the main screening method for patients 50 years and older, because the prevalence of colorectal cancer in this age group is at an average level.
In this group of subjects, nearly 20,000 patients did not suffer from cancer during the period 2002 to 2008. Approximately 5,000 patients were diagnosed with colorectal cancer and died of cancer in 2010.
Research and analysis found that most patients who died of cancer did not undergo colonoscopy. Comparing the screening history of the past 20 years, it is found that colonoscopy is associated with a 61% reduction in mortality, of which the risk of right colon cancer is reduced by 46%, and the left cancer risk is reduced by 72%.
Colonoscopy is necessary for these 22 conditions
(1) Those who have symptoms such as blood in the stool, melena, or long-term stool occult blood test is positive;
(2) Those with mucus, pus and blood in stool;
(3) People with frequent bowel movements, unformed stools, or diarrhea;
(4) Those who have had difficulty in defecation or have irregular bowel movements recently;
(5) Stool becomes thin and deformed;
(6) People with long-term abdominal pain and bloating;
(7) Unexplained weight loss or wasting;
(8) People with unexplained anemia;
(9) Abdominal masses of unknown cause, requiring a clear diagnosis;
(10) Unexplained elevated CEA (carcinoembryonic antigen);
(11) Long-term chronic constipation, who cannot be cured for a long time;
(12) Chronic colitis, long-term medication, who does not heal for a long time;
(13) Suspected colon tumor, but negative on barium enema X-ray examination;
(14) CT or other examinations of the abdomen found thickening of the bowel wall, and colorectal cancer needs to be excluded.
(15) Bleeding in the lower gastrointestinal tract, the bleeding focus can be found, the cause of the bleeding can be determined, and the bleeding can be stopped under a microscope if necessary.
(16) Patients who have suffered from schistosomiasis, ulcerative colitis and other diseases.
(17) Colonoscopy needs to be reviewed regularly after colorectal cancer surgery. Patients after colorectal cancer surgery generally need a colonoscopy every 6 months to 1 year. If the colonoscopy fails to examine all the colon due to colonic obstruction before the operation, colonoscopy should be performed 3 months after the operation to determine whether there are colon polyps or colon cancer in other parts.
(18) Those who have been found to have colon polyps and need to be removed under colonoscopy;
(19) Colonoscopy needs to be reviewed regularly after colorectal polyps.
Villiform adenoma, serrated adenoma, and high-grade epithelioma polyps are prone to recurrence and cancer. It is recommended to review colonoscopy every 3-6 months. For other polyps, it is generally recommended to review the colonoscopy every 12 months. If the colonoscopy is negative after the recheck, recheck after 3 years.
(20) People with a family history of colorectal cancer should undergo colonoscopy: if one person in the family has colorectal cancer, even if his immediate family members (parents, children, siblings) have no symptoms or discomfort, they should undergo a physical examination for colon Mirror inspection.
A large number of studies have proved that if a person has colorectal cancer, the probability of his immediate family members (parents, children, siblings) getting colorectal cancer is 2-3 times that of the normal population.
(21) People with a family history of colorectal polyps also need to undergo colonoscopy.
(22) People over the age of 40, especially those who have a long-term high-protein and high-fat diet and long-term alcoholism, are best to undergo a colonoscopy routine physical examination to detect asymptomatic early colorectal cancer as soon as possible.
Special reminder: Do not treat bloody stool as hemorrhoids!
1. Blood in the stool ≠ hemorrhoids!
The incidence of hemorrhoids is very high, and blood in the stool is the most common clinical manifestation of hemorrhoids, so many people think that blood in the stool is caused by hemorrhoids. This view is extremely wrong, because many other diseases can also cause blood in the stool, such as colon cancer, rectal cancer, anal fissure, and rectal hemangioma.
2. Hematochezia is the main clinical manifestation of colorectal cancer.
At the same time, blood in the stool is also a common symptom of dozens of anorectal diseases such as hemorrhoids, anal fissure, and enteritis. Therefore, it is impossible to determine the true cause based on blood in the stool. When hematochezia or melena occurs repeatedly, go to a regular hospital for colonoscopy in time to avoid delay in diagnosis.
3. Hemorrhoids will not cause rectal cancer, but hemorrhoids can be accompanied by rectal cancer at the same time.
Hemorrhoids are a benign disease that will not evolve into rectal cancer, but patients who have hemorrhoids can also get rectal cancer. It should be taken seriously.
4. Patients with hemorrhoids with blood in the stool should be highly suspected of rectal cancer.
The main symptoms of hemorrhoids and rectal cancer are blood in the stool. Some patients have a history of hemorrhoids, so as long as they have blood in the stool, they are considered to be bleeding from hemorrhoids. The blood in the stool caused by rectal cancer will also get better after hemorrhoid suppository treatment, but after a period of time, the blood in the stool will appear again, and it will not heal for a long time.
At this time, you should go to a regular hospital as soon as possible for digital rectal examination and colonoscopy to rule out the possibility of colorectal cancer.