Survey on the Treatment Reality of Patients With Epidermal Growth Factor Receptor (EGFR) Mutation-positive Non-small Cell Lung Cancer(NSCLC)

According to the recent report using EGFR tyrosine kinase inhibitors (EGFR-TKI), there is all over survival of the EGFR gene mutation-positive NSCLC in a tendency to extension. However, the real situation and the reason are not clarified.This observational study collects the data of EGFR gene mutation-positive NSCLC approximately 2,000 from the medical record of approximately 20 facilities in Japan and observes the treatment reality of EGFR gene mutation-positive NSCLC.