Various drugs are under study as possible treatments for colorectal cancer. A 2005 study found that patients who took the drug AvastinTM with their standard chemotherapy treatment had a longer progression-free survival than those who did not take Avastin, but the evidence is mixed on whether or not Avastin can extend life. (The generic name for Avastin is bevacizumab. ) Scientists are also working on vaccine therapies and monoclonal antibodies that may improve how patients immune systems respond to colorectal cancers. Monoclonal antibodies are a single type of antibody that researchers make in large amounts in a laboratory. 
What is (are) Colorectal Cancer ?