Screening means detecting the disease before its clinical signs appear, and this is particularly important because early diagnosis offers the opportunity to a favorable prognosis. Once symptoms appear, it is likely that the tumor has already spread to neighboring organs or has created distant metastases.

Many medical studies have been performed to identify the factors that may be considered risk factors for colorectal cancers. This information helps doctors choose people who should take screening tests. Screening is useful for those who do not have clinical signs of colon cancer. Taking the colon cancer screening does not mean that a positive diagnoses will be necessarily made. However, screening tests should be repeated at a certain period of time. If the screening test result is abnormal, some investigations are needed to confirm the diagnosis of colon cancer tumors.

The tests used in colon cancer screening can be extremely useful for the early diagnosis of the tumor, which also implies a favorable prognosis and a low rate of recurrence. Anyway, none of the medical studies have shown that screening tests can reduce the risk of death from cancer. Specialists are trying to find out through various medical studies the exact usefulness of cancer screening tests, as well as the benefits and the risks that the screening implies. Medical studies have proven also that the early detection really lowers the death rate from cancer.

Screening for colon cancer can have many forms. The colonoscopy is one of the colon cancer tests that provide the possibility of examining the colon using a flexible tube. Because there is a camera and a light tied on the end of the tube, the doctor can see inside the patients body through the imagines that are projected on a computer tied to the camera. Through this intervention, a biopsy sample can also be taken. The sigmoidoscopy is another test used for colon cancer detection. The doctor looks inside the patients’ body using a tube with a lens and a light source on the end. Though the tube, the doctor can see if tumors, abnormal growths or cancers have been developed by the patient. Another screening test is the barium enema, a special type of X-ray that uses barium sulfate and air to outline the lining of the rectum and colon, which provides the possibility to see if abnormal growths have been developed inside the individual body.

Regardless of the type of test used, colon cancer screening is in some cases crucial for the disease detection and cure. If you know that some of the risk factors that cause the cancer development were present, and if you are over 50 years old, you have to take the screening test on the periods recommended by your doctor.