Dad, Oscar, was told stage 4 lung cancer 2.5 wks ago. 1/3 sz brain tumor removed. 3 brain lesions. In bones&pos liver. Would u cyperknife brain tomorrow?

It depends. If you are 76, your Dad must be late 80s or early 90s. At such an advanced age it may not be worth being so aggressive with terminal cancer that at such advanced stage means he has only few weeks to few months left. However, if his desire is to be aggressive, Cyberknife is an effective an low risk procedure and I would recommend it highly. Otherwise, hospice care is very appropriate.