The TLK is a prospective, longitudinal, nation wide cohort study that collects data on the treatment reality of patients with NSCLC and SCLC. At inclusion, data in patient characteristics, comorbidities, tumor characteristics, biomarker testing and previous treatments are collected. During the course of observation data on all systemic treatments, radiotherapies, surgeries, and outcome are documented. Patients are followed until death or for a maximum of 3 years.
