1. Primary brain tumors such as low grade gliomas or oligodendrgliomas or astrocytomas and esp meningiomas after surgery have good prognosis.
In contrast gbms or high grade gliomas still require debulking surgery, chemorad and chemo but have very high risk of relapse and low survival. 2. Metastatic brain lesions carry poor prognosis unless solitary where it can be resected and have better outlook.