 Methods Patients with disseminated EGFR M NSCLC referred to one of the participating oncology departments may be offered enrollment in the project. A multicenter collaboration allows us to identify 200 EGFR M patients in a two-year period. The EGFR mutation must be diagnosed via a diagnostic tissue sample. Patients must be over 18 years and give a written consent before entering the study. Patients can at any time withdraw their consent. 