What tests should be done for colon cancer

Colon cancer has become well known to more and more readers because it has a very high incidence rate worldwide in recent years. In my country, there are more than 40 million patients suffering from colon cancer every year. It is extremely harmful to the health of patients. Here are some clinical examinations for colon cancer:

1. 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.