Radiation should help slow the progress of the disease. By in large you can expect a worsening of symptoms over time.
The Dex should help alleviate the worst if the symptoms in the near term.
Avastin may also be utilized to lessen the symptoms caused by the swelling.
You should ask your doctor about that.
There is no cure but timeline to progression is anyone's guess.
Dex and Avastin should be able to drastically improve his quality of life and (in the case of avastin) potentially prolong it
Hux...