Dstock, I don't know that 2 gm. is all that's needed to create a full batch of the vaccine, but if true, shouldn't it be possible to remove that much without surgery.
This would bring up the question, would treatment be equally effective, or even better, with a 2 gm sample of the tumor, and the right additional therapeutics added, or is it best to remove all the tumor that it's possible to remove.
Common logic might say take it all, but recovery from massive surgery might be tougher on the patient than use of a vaccine and other therapeutics that truly can eliminate the tumor from within.
I cannot say we're there, but over time I believe it's the direction we will be taking as we discover what can get the job done in that manner. Hopefully our vaccine will continue to be a part of the process in many forms of cancer.
Gary