Diagnosis for Colorectal Cancer
Early Colorectal Cancer screening can help in the detection of precancerous polyps, which can help the doctor make a prognosis and ensure that the person gets the best Colorectal Cancer treatment. The following are the tests conducted for Colorectal Cancer diagnosis.
- Blood stool test
The procedure involves checking a sample of the patient’s feces for the presence of blood. A blood stool test doesn’t have 100% accuracy because not every cancer causes blood loss. This test can, therefore, show a false negative result. A sample of stool may have the presence of blood owing to other illnesses or conditions as well, such as hemorrhoids.
- Stool DNA test
The test aims to analyze the DNA markers that precancerous polyps cells or Colorectal Cancer shed into the feces.
- Flexible sigmoidoscopy
In this procedure, the doctor makes use of a sigmoidoscope, a slender, flexible, lighted tube, to examine the patient’s sigmoid colon and rectum. The last part of the colon is the sigmoid colon, which comes before the rectum. This mode of diagnosis can help detect cancerous cells or polyps only at the end of the colon and not other parts of the digestive tract. In case the doctor detects any abnormalities, he might recommend a colonoscopy for analyzing the entire colon and thereafter remove polyps, if any.
- Barium enema
X-ray Barium, in an enema form, is placed in the patient’s bowel, and it displays images on an X-Ray. The barium coats and fills the walls of the bowel, showing a clear image of the colon, rectum, and a section of the small intestine as well. If the barium enema X-Ray detects polyps or anything abnormal, the doctor might advise a colonoscopy.
Longer than a sigmoidoscope, a Colonoscope is a flexible, long, slender tube, which has a video camera and a monitor attached to it. With this device, the doctor can see the entire colon and rectum. A colonoscopy helps easy discovery of polyps and the doctor might take tissue samples to conduct a Colorectal Cancer Biopsy. The procedure is painless but to calm down patients, the best Colorectal Cancer hospital prescribes mild sedatives.
- CT colonography
A CT machine carries out colonography by taking images of the colon. If any polyps are detected, the doctor might recommend a conventional colonoscopy for further assessment and clarification. Compared to colonoscopy, this procedure might be a better-tolerated and less-invasive alternative for patients with a risk factor of contracting Colorectal Cancer.
- Imaging scans
The reports of MRI scans or Ultrasound can show if Colorectal Cancer has spread to other parts of the body.