"Cetuximab in Patients With Lung Adenocarcinoma Receiving Erlotinib That Have Developed Acquired Resistance to Erlotinib"

The phase I portion will accrue as many as 3 cohorts of 3-6 patients; receiving erlotinib 100 mg daily along with escalating doses of cetuximab administered every 2 weeks beginning at 250mg/m2 IV without a loading dose. Subsequent cetuximab dose levels will be 375 mg/m2, and 500 mg/m2, administered IV every 2 weeks. Patients will have baseline CT, labs and ECG done within 2 weeks of study entry. Three patients will be enrolled per dose level. Patients will be monitored for toxicity weekly for the first 5 weeks, and every 2 weeks thereafter. Patients will be monitored for response by CT in the fourth week of combined therapy and every 8 weeks. All patients in this portion of the trial will receive intravenous cetuximab every two weeks at the MTD (to be determined in phase I portion) and daily erlotinib on an outpatient basis and will obtain clinical re-evaluation and radiographic re-imaging on a schedule similar to that followed in the phase I portion