The patient is sedated and physician looks for an abnormality in the intestine with a computer aided device.
It is the removal of a small amppount of tissue for examination under the microscope. A biopsy is the confirmatory test for colorectal cancer or colonal cancer.
Biomarketing testing of the tumour:
The colorectal cancer should be tested for problems in mismatch repair proteins called mismatch repair defect.
Patient with the colorectal cancer may tends to bleed through rectum. This results in the aneamia in patients. Complete blood count might reveal whether the bleeding is occurring or not.
Other levels of protein such as the carcinoembryonic antigen which detects if the cancer has spread to other regions or not.
Fecal immunochemical test:(FIT0
This test reveals if the blood is present in the stool or not
Guaiac based feacl occult blood test(gFOBT):
It is similar to the FIT but it reveals the occult blood in stool.
Fecal DNA test:
It tests the genetic mutations and presence of cancer cells in the stool.
A CT scan takes three dimensional pictures of the abnormal tissues from different angles.
Magnetic Resonance Imaging:
A MRI scan uses the combination of the magnetic and radiowave frequency to view the abnormal tissues.
An dye is injected in the vein or the patient is asked to swallow the dye and the results are observed.
A sound waves to create the picture of the internal organs to find out if the cancer is spread or not.
Abdominal ultrasound: with the patient symptoms it can be used to view the pancreas. But it cannot reveal the spread of pancreas.
Endoscopic ultrasound: in this method the doctor uses an ultrasound probe, and with the guidance of endoscope it is passed in to the small intestine and then into the pancreas to view the structures.
The patient is asked to swallow the liquid Barium. Barium gets deposited in the lining of the stomach ,
esophagus and small intestine.
If X rays are taken at this time it might show some blockages in the stomach and other areas clearly.
Positron emission tomography (PET) or PET-CT scan.:
A PET scan is a way to create pictures of organs and tissues inside the body. A small amount of a radioactive sugar substance is injected into the patient’s body. This sugar substance is taken up by cells that use the most energy. Because cancer tends to use energy actively, it absorbs more of the radioactive substance. However, the amount of radiation in the substance is too low to be harmful. A scanner then detects this substance to produce images of the inside of the body
Liver function test:
The bilirubin levels and the level of other digestive enzymes and liver enzymes such as Alanine transaminase, Aspartate transaminase and Alkaline phosphatase should be checked.