By Turna Ray

Following the accelerated approval of Vectibix in the US in 2006, follow-on studies have failed to show that metastatic colorectal cancer patients on the drug live longer than those receiving standard chemotherapies. However, Amgen this week said it is in the process of conducting a study to try to prove that Vectibix-treated chemorefractory patients whose tumors express the wild-type KRAS gene do survive longer than patients receiving just chemotherapy.

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