OA05.01 Pembrolizumab in Patients with Extensive-Stage Small Cell Lung Cancer: Updated Survival Results from KEYNOTE-028

  • Ott P
  • Felip E
  • Hiret S
  • et al.
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Abstract

Results: Among the 63 stage 4 AC cases, the most common genomic alterations were ALK rearrangements (n¼28; 44% of stage 4 AC cases) and EGFR mutations (n¼17; 27%) while the other genomic alterations (n¼18; 29%) include ROS1, BRCA2, HER2, P53, RET and ATM. The prevalence of active smoking and/or exposure to passive smoking was highest among those with ALK (64%), intermediate for those with EGFR (47%) and lowest for those with other genomic alterations (39%). However, the prevalence of only active smoking was lowest among those with ALK (28%), followed by EGFR (35%) and highest for those with other genomic alterations (39%). The majority of patients with ALK rearrangements or EGFR mutations reported no family history of lung cancer (82% and 88%, respectively), compared with 67% among those with other genomic alterations. Conclusion: These preliminary results suggest that lifestyle characteristics and family history in young lung cancer patients may differ by genomic alteration. Passive smoke exposure was more prevalent among those with ALK rearrangements or EGFR mutations. Those with other genomic alterations, albeit, a heterogeneous group, were least likely to be exposed to passive smoking and more likely to be active smokers. We are continuing to enroll participants and are expanding the epidemiologic characterization to all study patients to evaluate if risk factors also differ by tumor stage and histology (Data to be presented). Importantly, this analysis lays the groundwork for the development of our more comprehensive epidemiology of young lung cancer study that may identify potential lifestyle and environmental risk factors related to specific genomic alterations. Background: Patients with extensive-stage disease (ED) small cell lung cancer (SCLC) have limited treatment options and poor survival following failure of platinum-based chemotherapy. Pembrolizumab, a humanized antieprogrammed death 1 (PD-1) antibody, has demonstrated robust antitumor activity and a favorable safety profile in multiple tumor types. Here, we present updated safety and efficacy data, including survival, for patients with ED SCLC enrolled in the KEYNOTE-028 (ClinicalTrials.gov, NCT02054806) study.

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Ott, P., Felip, E., Hiret, S., Kim, D.-W., Morosky, A., Saraf, S., … Mehnert, J. (2017). OA05.01 Pembrolizumab in Patients with Extensive-Stage Small Cell Lung Cancer: Updated Survival Results from KEYNOTE-028. Journal of Thoracic Oncology, 12(1), S259. https://doi.org/10.1016/j.jtho.2016.11.250

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