Non Small Cell Lung Cancer Patients Treated With Erlotinib Six Months or Longer

You may be eligible if

• Patients must have had NSCLC.
• Patients must have received erlotinib (single-agent) for six months or longer for NSCLC in the second/third line setting or as maintenance therapy.
• Patients must have tissue available for EGFR-mutation status testing (if not previously performed) or EGFR-mutation status test results available.
• Patients must have tissue available for exploratory genetic analysis.
• Patients must have all clinical information, treatment response data and outcomes data available for review.
• Patients must be deceased.