What is the examination knowledge about colon cancer

Colon cancer is one of the most common malignant tumors, and its incidence ranks 4th to 6th among malignant tumors. The incidence has been on the rise in recent years. The 5-year survival rate after radical resection is about 50%. In order to better prevent colon cancer, it is particularly important to know the diagnosis of colon cancer. Next, let the experts explain the knowledge about colon cancer examination.

(I) X-ray examination

1. Abdominal plain film examination is suitable for cases with acute intestinal obstruction, which can show that the colon above the obstruction site is inflated and swollen.

2. Barium enema examination shows that the intestinal wall at the site of cancer is rigid, with poor distensibility, peristalsis weakened or disappeared at the lesion, irregular or disappeared colonic bag shape, narrow intestinal cavity, disordered, destroyed or disappeared mucosal folds, filling defects, etc. Barium-air double contrast radiography is more helpful in diagnosing pedunculated tumors in the colon.

(ii) The carcinoembryonic antigen (CEA) test has little diagnostic value for early cases, but it is helpful in estimating prognosis and judging recurrence.

(III) Sigmoidoscopy and fiber colonoscopy Although the sigmoidoscope is 25 cm long, 75% of colorectal cancers are within the scope of the sigmoidoscope. Microscopic examination can not only detect cancer, but also observe its size, location and local infiltration range. Sigmoidoscopy can be used to take tissue for pathological examination. Fiber colonoscopy can provide a higher diagnosis rate and has been widely used in China. Skilled operators can insert the fiber colonoscope into the cecum and terminal ileum, and can also take photos. It is indeed an ideal examination method.

(iv) Anal digital examination and rectal endoscopy to check for rectal polyps, rectal cancer, internal hemorrhoids or other lesions for identification.

At present, there is still a lack of practical plans for large-scale population prevention and control surveys of colon cancer. The only way is to promptly use appropriate examination methods when encountering the above-mentioned suspicious signs of colon cancer and make an early diagnosis, especially when encountering positive fecal occult blood tests, it is necessary to further identify the causes and treat them in time.

The above is what I have introduced to you about the diagnosis of colon cancer. I believe you have a certain understanding of it. Experts suggest: If you have symptoms of disease in your health, you can choose the appropriate treatment according to your symptoms. Do not delay diagnosis. You should go to a regular hospital for treatment in time to avoid delaying the disease. If you have other questions, please consult our online experts or call for consultation. Believe in miracles and wish you health, happiness and joy!

Colon cancer http://www..com.cn/zhongliu/jca/