MM, I know there are several trials that are going on that are showing good results so far. Make sure you ask you Doc to research possible experimental treatments you could volunteer for. Right now, there are a couple small-molecule caspase-3 apoptosis promoters which target only cancerous cells. The small-molecule is important because it can cross the blood-brain barrier which most cancer treatments can't, allowing it to target brain tumors specifically. I am just writing this from memory regarding a talk I went to a month ago, so I may be off a bit, but I think it's something to look into.
here,
I just found this article which touches on what I am referring to.
This is not my expertise at all, but I do think if you haven't already, tell your doctor to do extensive research about what experimental studies there are. Don't let the Doctor be lazy, it's on you to direct the doctor to do your bidding. Be more loud and abrasive with the Doc than you have with anyone on this site ever. haha.