Brain Metastases in Norway - A Prospective Cohort Study

The overall aim and primary outcome of this study will be a descriptive analysis of the current treatment practice of BM in Norway. Specifically, it may give answers to the following research questions: * What is the true incidence of BM in Norway? * How are patients with BM treated at present? * Do treatments differ between hospitals? * How do treatments impact quality of life of the patients? * Which factors (treatment, tumor and host variables) can explain disease control, survival, symptom relief, and general functions? * How can BM staging be improved?