What are the diagnostic methods for colon cancer

Colon cancer is a common malignant tumor in the gastrointestinal tract. The highest incidence rate is in the 40-50 age group. The cause is not yet very clear, but some diseases such as familial polyposis have been recognized as precancerous lesions; colon adenoma, ulcerative colitis and colon schistosomiasis are closely related to the occurrence of colon cancer. The early symptoms of colon cancer are often mild or not obvious, often ignored by patients, and easily missed. At this time, diagnosis is needed.

(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 the content related to colon cancer diagnosis that I introduced to you. I hope it will be helpful to you. Once you find any abnormal symptoms in your body, please go to the hospital in time to avoid delaying the disease. If you still have questions, please consult online experts. Feihua Health Network wishes you good health!

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