Malignant tumors typically do not spread to other parts of the body . The average life expectancy is from 10 to 18 years after diagnosis . Edward `` Ted '' Kennedy , who served as a Democratic senator from Massachusetts for nearly 47 years , died just over a year after his surgery . Experimental treatments include surgery and Avastin for new tumors .
Malignant tumors typically do not spread to other parts of the body . The average life expectancy is from 10 to 18 years after diagnosis . Experimental treatments include surgery and Avastin for new tumors .