• Progression free survival and overall survival [ Time Frame: 3.5 years ] [ Designated as safety issue: No ]
  

• FDG- and FLT-PET responses [ Time Frame: 3.5 years ] [ Designated as safety issue: No ]
  

Inclusion Criteria:

• Signed Informed Consent Form(s)
• Histologically confirmed NSCLC
• Recurrent or progressive disease after receiving at least one chemotherapy regimen for advanced or metastatic NSCLC
• ECOG performance status 0, 1, or 2
• Age ≥ 18 years
• Recovery from reversible acute effects of prior anti-cancer therapy (chemotherapy, radiotherapy, or investigational treatment) to NCI CTCAE Grade ≤ 1 (excluding alopecia)
• Ability to comply with the study and follow-up procedures, including all specified imaging studies
• Ability to take oral medication
• Availability of archival diagnostic paraffin-embedded tumor tissue and willingness to provide sufficient tissue for testing for EGFR levels in tumor by both IHC and FISH
• Life expectancy ≥ 3 months
• Measurable disease on CT
• At least one detectable lesion on FDG-PET scan and/or FLT-PET scan that is measurable on CT
• Use of an acceptable means of contraception (men and women of childbearing potential) or documentation of infertility

Exclusion Criteria:

• Prior treatment with an investigational or marketed agent for the purpose of inhibiting EGFR (including, but not limited to, erlotinib and gefitinib)
• Chemotherapy, radiotherapy, or investigational treatment within 14 days or within 5 half-lives of the active molecules in the chemotherapy or investigational treatment, whichever is longer, prior to study entry or from which patients have not yet recovered
• Inability to take oral medications, disease affecting gastrointestinal absorption, or prior surgical procedure affecting gastrointestinal absorption
• Uncontrolled diabetes
• Any unstable systemic disease (including active infection, unstable angina, congestive heart failure, myocardial infarction within 1 month prior to study entry, hepatic, renal, or metabolic disease)
• Pregnancy or lactation
• History of another malignancy in the past 2 years, unless the malignancy has been adequately treated, is currently not detectable, and is associated with a 5-year survival > 90%
• Claustrophobia
• Any other disease, condition, physical examination finding, or clinical laboratory finding which, in the opinion of the investigator, makes the patient inappropriate for the study