<s>[INST] My friend has grade 2 and grade 4 brian tumors.He is going to have radiation,chemo to treat them. They told him at another hospital he had 15 to 18 months with treatment so I wanted to know with treatment could he live longer or wuld that be the max with treatments. His is very aggressive.He had one removed and at the time that was all they found. This was Feb 26,2013. [/INST] Hi, Grade 4 brain tumor most probably nuroblastoma multiform. The prognosis depends on several other factors like age, performance status, symptoms. There are specific scoring system to predict the life expectancy in this case. Anyway, treatment can definitely prolong the survival, but that depends on individual. You should complete the treatment to have the best possible outcome. Consult your oncologist. </s>