What are the clinical methods for colorectal cancer testing?

In recent years, colorectal cancer has become a major disease that endangers human life. It has brought great pain and distress to humans. Do you know the symptoms of colorectal cancer? Experts say that due to the different locations and ranges of the lesions, the symptoms of colorectal cancer vary. Once colorectal cancer is discovered clinically, it can be diagnosed early. If you can understand the symptoms of colorectal cancer, it can help me be more vigilant about colorectal cancer. So what are the clinical methods for testing? The following are the clinical test methods for colorectal cancer for your reference.

1. Fecal occult blood test:

It can be used as a method for the initial screening of colorectal cancer. Generally, the benzidine method can be used, which is simple and easy to use. If conditions permit, immunological methods can be used to improve the accuracy rate.

2. Serum carcinoembryonic antigen (CEA) test:

CEA examination has certain false positive and false negative rates, and does not have specific diagnostic value. It is not suitable for general screening or early diagnosis, but it can be helpful in estimating prognosis, monitoring efficacy and recurrence.

2. Anorectal examination:

Generally, rectal tumors within 78 cm from the anus can be found. Rectal examination is simple and easy. If the patient is asked to hold his breath to increase abdominal pressure, a higher position can be reached. Rectal examination is of great significance in understanding the extent of the lesion and choosing the surgical method. Rectal examination is still the most basic and important examination method in general examination before rectal cancer surgery.

3. Endoscopic examination:

For patients who are suspected of having colon polyps or X-rays showing polyps that need further differentiation of benign or malignant, or patients who have unexplained blood in the stool and occult blood in the stool and are suspected of having colon tumors, microscopic examination can help with diagnosis, determine the extent of the lesion, or obtain tissue for pathological examination.

4. Double contrast colonic barium X-ray:

Rigidity and localized stenosis. Polypoid colon cancer may present a filling defect shadow with irregular edges that bulge into the cavity; invasive colon cancer presents thickening of the intestinal wall. There are irregular destructions on the surface of stenosis; ulcerative colon cancer can be seen with a niche shadow with irregular edges and filling defects, and the affected intestinal segment is localized and rigid.

5. CT examination:

It can help understand the level of tumor infiltration into the intestine and whether there is local lymph node or distant metastasis.

6. Cytology examination:

The diagnostic compliance rate is high. Common methods for colorectal cancer exfoliated cell examination include rectal washing, brushing under direct vision of colonoscopy, wire mesh balloon wiping, and digital smear examination of anorectal lesions. Direct colonoscopy smear examination is more commonly used in clinical practice.

The above introduces the clinical test methods for colorectal cancer. Expert Tips: If you have symptoms of disease, you can choose the appropriate treatment according to your symptoms, but do not delay diagnosis, and do not let your life be ruined by hesitation. You should go to a regular hospital for treatment in time to avoid delaying the disease and causing serious consequences. If you have other questions, please consult our online experts or call for consultation. Believe in miracles, and wish you health, happiness, and joy!

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