What kind of quality of life can you expect with Avastin?

I feel your pain. I lost 3 cousins, and my mother to cancer. Life and what can you expect... That can not be answered as it is your up to the Good Lord on how your dad responds. I like the medicine the doctor put your father on. With family there to give love will most assurdly help him with his response. I am not saying hanging on to him, but if he wants something be there for him. Talk it over with his doctor on how strict you need to be when he wants something he really should not have.Some diabetics wants candy, some doctors feel that is ok as the sugar problems can be fixed. When my mom's eating went down to nothing, I found something she would eat. Cool Whip with fruit mixed in. It goes down so easily. I will keep your father in my thoughts and prayers.

BTW here are the side effects to the drug your father is on.

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"Avastin Side EffectsWhile most people have no problems when taking Avastin, side effects can occur. Commonly reported ones include nausea, stomach pain, high blood pressure, and vomiting. These side effects are generally mild and easily treated.
However, some reactions to Avastin should be reported to your healthcare provider right away, including signs of a hole in the intestines, unusual bruising, and signs of an allergic reaction."

http://www.drugs.com/sfx/avastin-side-effects.html