My advice? Firstly get this lump biopsied or await the actual test results. I had a lump i was told was likely cancerous and it turned out not to be. If it is, speak to as many professionals as you feel you need too and stick to your guns - but if the general consensus advises chemo as being the only likely way of attacking the disease aggressively, then be it on your own head (as they say) if you choose against it. I hope that doesn't happen and more importantly I hope you don't actually have cancer. All the best.