Prof. Chen Jialiang (Dean of the Faculty of Medicine, Chinese University of Hong Kong, Specialist in Gastroenterology and Hepatology. He insists on taking administrative, teaching and diagnosis work. He is on the front line to find the direction of reform. He can also teach students by example, and is committed to cultivating a conscience with medical ethics. doctor) "Doctor, can you not take a bowel shot?" "Drinking diarrhoea is so hard!"
"Aren't you afraid of having fecal occult blood test?" "I heard that a blood test can be used to measure the cancer index?" "I'm afraid of cancer, but I'm afraid of the troublesome and hard work of taking a colon..." These are some of the reasons why many photo background removing citizens are discouraged from preventing colorectal cancer. As we all know, colorectal cancer is the most common cancer in Hong Kong, with more than 5,000 new cases every year, and the mortality rate is also the second highest among all cancers. Colorectal cancer can be prevented or treated early through screening. Colonoscopy is the most accurate, but most people are afraid of invasive examinations and hate colonoscopy, so they are not widely used. Fecal occult blood test patients may have a false alarm Is the fecal occult blood test accurate?
Occult blood refers to the presence of trace amounts of blood in the stool that are invisible to the naked eye, thereby inferring whether there is colorectal cancer. Unfortunately, occult blood can only be detected by tumor bleeding, so the accuracy of the occult blood test is only about 70%. False positives also occur frequently. For example, people with hemorrhoids or those taking aspirin have the opportunity to have false positives, giving the patient a false alarm. In addition, we know that polyps are a precursor to colorectal cancer, but polyps don't usually bleed, so the fecal occult blood test cannot detect polyps.