RAS+Affect+On+Anti-EGRF+Antibodies+in+Colon+and+Rectal+Cancer. 

=__Introduction__=

__1. Colorectal Cancer__
Colon and rectal cancer are the most common type of tumor in both genders combined in the Western countries.The prevalence of disease and mortality is high. Like all cancers, colorectal cancer mostly occurs due to environmental stimuli and as a result of increasing age. It is recommended that screening for colorectal cancer start at the age of 50, and continued till the patient is 75. Normally, colorectal cancer is initiated in the lining of the bowel. As the cancer becomes invasive it moves to the muscle layers underneath, and eventually through the bowel wall. If the cancer remains in the bowel wall, it is often curable through surgery.

__ 2. Symptoms and Diagnosis __
Rectal Bleeding and anemia are the common signs of a colorectal tumor, especially in those over 50.

__ 3. Treatment __
Once metastatic a patient is often given chemotherapy intervention to increase their survival span. Although surgery is the main and most successful form of treatment, better strategies for using EGRF antibodies in colon cancer are being researched.