LAUSR

172Background: Two revolutions recently occur in the treatment of advanced NSCLC: the development of targeted therapies and of ICI). Both strategies have been shown to outperform chemotherapy. Patients with molecular alterations are usually considered as poor candidate for immunotherapy. Here, we aimed to analyze the efficacy of immunotherapy in NSCLC patients with oncogenic addiction. Methods: We conducted a retrospective multicentric study, on patients treated with ICI and carrying an activating molecular abnormality: EGFR, ALK, KRAS, ROS1, HER2, BRAF, MET and RET. We have collected anonymized data, which were evaluated for clinical characteristics and outcome (progression free survival duration of ICI treatment and overall survival since initiation of ICI). Results: 209 patients were registered from 7 centers in France and Switzerland. 198 patients had adenocarcinoma (95.2%), 6 large cell carcinoma (2.9%), 161 were former or current smokers (81.3%), 99 were female (47.4%), median age at diagnosis was 5...