e18105 Background: AMR is a totally synthetic anthracycline and a potent topoisomerase II inhibitor. Recent phase II trials demonstrated that AMR provided promising response rates. AMR was approved for the treatment of lung cancer in December 2002 in Japan. We retrospectively investigated the clinical outcome in pts with SCLC, comparing overall survival before and after AMR approval. Methods: The medical records of SCLC pts who received treatment at the National Cancer Center Hospital East between July 1992 and December 2007 were reviewed. A total of 712 pts received chemotherapy as an initial treatment. 110 pts received AMR. Among them, 107 pts received an initial chemotherapy after 2002. The 712 pts were divided into two groups: group A included pts received an initial chemotherapy between 1992 and 2001 (n=364), and group B included after 2002 (n=348). Results: Pts characteristics including age, gender, PS, and stage (limited or extensive) had no statistical difference among group A and B. Survival was not significantly different in pts with limited disease (LD) between group A and B; however, group B tended to have better survival in pts with extensive disease (ED) (p=0.069). Multivariate analyses in pts with ED demonstrated that group B had significantly longer survival (hazard ratio: 0.783, 95% confidence interval [CI]: 0.624-0.982). Conclusions: After approval of AMR, survival has been improved especially in pts with ED-SCLC. n Median survival time (months) 95% CI 2- year survival rate (%) 3-year survival rate (%) 5-year survival rate (%) Group A (1992-2001) 364 11.8 10.5-13.1 21 14 9 LD 176 19.4 17.2-21.6 35 24 16 ED 188 9.3 8.36-10.3 8 4 2 Group B (2002-2007) 348 13.9 12.7-15.2 23 16 10 LD 195 17.5 15.0-19.9 32 24 15 ED 153 10.2 8.52-11.8 9 5 3 Author Disclosure Employment or Leadership Position Consultant or Advisory Role Stock Ownership Honoraria Research Funding Expert Testimony Other Remuneration Nippon Kayaku