Brain Tumours

In patients with non-small cell lung cancer and brain metastases 1. at presentation (stage IV disease) radiotherapy is the best treatment 2. chemotherapy is the best treatment in patients with poor performance status 3. in ALK mutated adenocarcinoma crizotinib is the appropriate treatment 4. in ALK mutated adenocarcinoma crizotinib prolongs survival compared to whole brain RT 5. none of these