The prognosis for<unk>  is variable; it depends on the type of primary cancer, the age of the patient, the absence or presence of extracranial<unk> , and the number of metastatic sites in the<unk> . For patients who do not undergo treatment the average survival is between one and two months. However, in some patients, such as those with no extracranial<unk> , those who are younger than 65, and those with a single site of<unk>  in the<unk>  only, prognosis is much better, with median survival rates of up to 13.5 months. Because<unk>  can originate from various different primary cancers, the Karnofsky performance score is used for a more specific prognosis.
Brain metastasis
Brain abscess
Leptomeningeal cancer
Central nervous system cavernous hemangioma
Coma
Brainstem glioma
Subdural empyema
Brain tumor