Cindy,
Even if cancer takes your audible voice, your strongest voice is right here. If it costs that audible voice to defend that larger voice then I selfishly say that I want you to make that sacrifice. Dr. Steven Hawking has spoken only through a voder for decades and has had a major impact upon the world. I find your impact, taking into account only the parts I'm aware of, no less great. I'm vaguely aware of what you have done outside this place and believe that it is no less than your impact here.
Please take care of yourself.