When given 3 to 6 months prognosis, because of metastic breast cancer that has returned 3 times now to brain, what will the body/disease do as result?

It depends: The degree of control of the brain tumor is important. Although it has returned, the question is whether all avenues such as surgery, gamma knife or both have been used to control the brain tumors. With respect to the rest of the body, imaging/staging studies should be done to see how extensive the breast cancer is. That is, has it gone to the liver or lung or bone?That would make a big difference.

Variable: When a patient develops brain metastases, their symptoms are determined by the location of the lesion therefore the body reaction will vary based upon the location in the brain of the metastases. There may be motor changes, cognitive changes or total body failure.