- 1. Evidence of distant metastasis 2. Prior chemotherapy or anti-cancer biologic therapy for any type of cancer, or prior radiotherapy to the head and neck region 3. Other previous cancer, except for in situ cervical cancer and cutaneous basal cell carcinoma 4. Pregnant or breast-feeding females, or females and males of childbearing potential not taking adequate contraceptive measures 5.Presence of an uncontrolled concomitant illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, or cardiac arrhythmia