The study is based on the collection of blood samples and tumor sample analysis, in real world NSCLC stage IIIA/B and IIIC; PD-L1\>1%; non-resectable patients on treatment with IO after cCRT without progression. The patients participating in this study will not receive treatment in relation to the study, no drugs will be provided. Patients will be treated as per standard clinical practice. All data collected for this study will be collected retrospectively from patient clinical chart. Only secondary data collected will be analyzed together will samples analysis information.The duration of the study is expected to be 3 years.
