Never say never but generally the medications recommended/required for initial treatment include high dose steroids that the FAA would be reluctant to waiver because of their own side effects. And the course of the disease with this treatment is labile enough that they would also be reluctant to grant waivers.
Barring successful bone marrow transplant, I think it's unlikely, but like I said, never say never.
The thing to do is get the best treatment for the illness you possibly can, somewhere like MD Anderson, the Mayo Clinic, Seattle Cancer Care Alliance, etc. then see how it goes.
You will have to convince the FAA that you are stable after treatment and not on high dose steroids or other disqualifying meds. That won't happen quick but nothing is impossible. Good luck.