my mother , 80 yrs, has been diagnosed with angio sarcoma cancer , it's in her left cheek, fore head , back of her head . the doctor says its a blood /vascular cancer . rare type . what are best treatments , long term treatment, chances of survival,life expactancy after diagnoses. this is second bought with it , started a year ago with 2 lumps under l & r jaw , surgery & radiation first time , 3 mos later , as is now , started chemo , had to stop after 4 rounds of it , getting strenth up to continue last 2 rounds . then whats the best treatment ?