Several targeted therapies are already used to treat colorectal cancer, including bevacizumab,which is an angiogenezis inhibitor (Avastin), cetuximab (Erbitux),which is a Epidermal Growth Factor Inhibitor, and panitumumab (Vectibix). Targeted therapies are currently used to treat advanced cancers, but newer studies are trying to determine if using them with chemotherapy in earlier stage cancers is useful as part of adjuvant therapy in an attempt to further reduce the risk of recurrence.