Overview Iressa for EGFR Mutation Negative Non-small Cell Lung Cancer (NSCLC) Status: Unknown status Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary The investigators will examine efficacy and toxicity of gefitinib in Korean patients with EGFR wild tumors diagnosed with direct sequence test. Phase: Phase 2 Details Lead Sponsor: Samsung Medical CenterTreatments: Gefitinib