A. Which colon polyp will become malignant? The evolution and regression of colon polyps should be based on their pathological categories, and the regression and prognosis of several common lesions are briefly described as follows: adenomas, because they may be multiple or have cancerous coexistence, and there is increasing evidence that benign polyp-like tumors can become malignant over time and under certain conditions. The possibility of carcinoma should be considered when multiple adenomas are larger than 2.5 cm in diameter, or hard to the touch of fingers or instruments, or obvious congestion, or ulceration on the surface, and the possibility of carcinoma should vary with the nature and size of adenomas. 2.Papillary adenoma has a high possibility of carcinogenesis and is considered to be a pre-cancerous lesion with a malignant rate of about 30%. Because of its clinical manifestation of mucus discharge, even a large amount of mucus discharge or a large amount of mucus diarrhea can occur, which can reach more than 3000ml per day and lead to serious dehydration, electrolyte disorders, circulatory failure, acidosis and other metabolic disorders. If fluid supplementation is not given in time and the adenoma is not treated, it can cause life threatening. 3.Children type polyps are more common in childhood and less common in adulthood, but it is worth noting that there have been reports of malignant transformation of such polyps in China. 4, inflammatory polyps, hyperplastic polyps, in addition to inflammatory polyps may be cancerous, it is difficult to determine or there is a possibility, hyperplastic polyps clinically asymptomatic, most of them are occasionally found during colonoscopy, due to its small body, mostly around 0.5cm, often does not cause physical discomfort. 5, familial polyposis, is a rare genetic polyposis. The colon and rectum are covered with polypoid adenomas, cancer is only sooner or later, and the cancer is often not limited to one place, for multi-center, in fact, some patients are already colorectal cancer when they seek medical attention. Second, colon polyps can cause what diseases? Colonitis has the following common complications: 1, a lot of blood in the stool: blood in the stool is one of the main clinical manifestations of colitis, the amount of blood in the stool is also an indicator of the severity of the disease. 2. Intestinal stenosis: It occurs in patients with extensive lesions and duration of the disease lasting more than 5-25 years, and its location is mostly found in the left hemicolectomy, sigmoid colon or rectum. When heavy, it can cause intestinal obstruction. When intestinal stenosis occurs in colitis, be alert to tumors and identify benign malignant. 3, toxic intestinal dilatation: this is a serious complication of colitis, mostly occurs in patients with total colitis, the mortality rate can be as high as 44%, the clinical manifestations of the rapid deterioration of the disease, toxic symptoms are obvious. 4, intestinal perforation: mostly a complication of toxic intestinal dilatation, can also occur in severe type, mostly in the left hemicolectomy, the application of corticosteroids is considered to be a risk factor for intestinal perforation. It is accompanied by diarrhea, abdominal pressure and rebound pain, diminished or absent bowel sounds, increased white blood cell count, and easily complicated by intestinal perforation. 5, colonic tumors: about 5% of patients with colitis develop malignant changes, and those with a history of more than 10 years. Third, what about children with colon polyps? Any polyp-like lesions protruding from the mucosal surface into the intestinal cavity are called polyps before the pathological nature is determined, and can be classified according to the pathology: adenomatous polyps (including papillary adenomas) are the most common, inflammatory polyps, the result of proliferation of intestinal mucosa stimulated by long-term inflammation, misshapen polyps, others, such as mucosal hypertrophy and hyperplasia to form hyperplastic polyps, lymphoid hyperplasia, carcinoid tissues and other disorders. Clinically, colorectal polyps are more common and have more obvious symptoms. So, how is the treatment of colon polyps in children? 1.Electrocoagulation under fiber colonoscopy: electrocoagulation under direct view of colonoscopy has become a common means of polyp surgical treatment today, for polyps with tips or smaller broad-based polyps, can be electrocautery removed from the polyp tip with a trap under fiber colonoscopy. But the treatment process must be extra careful, otherwise it can cause serious complications such as intestinal perforation. 2, surgical removal: rectal polyps can be surgically removed from the tip under the anoscope, pay attention to the polyp tip must be clean and complete removal, otherwise it can lead to postoperative recurrence, usually after removal of the polyp tip ligature, let it necrosis fall off on its own. Surgical excision is the treatment often used for rectal polyps. Fourth, why does green tea have a preventive effect on colon polyps? The continuous use of drugs containing catechuic acid, a component of green tea, can inhibit the recurrence of colon polyps. According to Kyodo News, this is the first time that the green tea drug can prevent the recurrence of polyps through clinical trials. Colon polyps are the source of colon cancer. The results suggest that they can be prevented with a simple green tea drug.