- To assess whether 3'-deoxy-3'-[18F] fluorothymidine (FLT) and fludeoxyglucose F 18 (FDG) PET scans can be used to identify patients with advanced squamous cell carcinoma of the oropharynx, larynx, or hypopharynx who have a biochemical response after 2 weeks of induction therapy with cetuximab.