hemangiopericytoma HELP

[deggie]

i was diagnosed hemangioperycitoma in 2002... it's a long story..
i first was diagnosed for a-typical meningioma but in 2002 i was told the pathology had a wrong diagnose... the told it was HPC.
the tumor in my head has been removed complety and there was no radiation necessary
now i have much metastases in my bones and since 3 months in my lungs and it keeps growing! every time there are metastases the give me radiation but that seems to stop after 3 times!
now i have had chemotherapy but that seems to be not working!
has anybody have an idea how to get further with this disease?
please answer me because the there is little time left!
thanks all of you!
i am a man of 46 and come from holland.