stage IV advanced -- likely options?

Scenario: *advanced CC with mets on abdominal wall and liver * weight loss beginning * patient 83 years, but more like 53 (not kidding) We will see what onc says, but my guess is that surgery is not possible initially.  I guess I am wondering at this point whether radiation can be offered, at least initially, no matter how advanced? I know avastin is quite common now, but my concern is that it is available only in combination with chemo.  I suppose the protocol is different than it used to be, and is not given in weekly high dose format, but rather in smaller daily doses.  This may reduce the severity of the side effects.  So many questions...that's enough for now. thank so much in advance