When I was 42 I was diagnosed with malt lymphoma originating in my stomach lining which had moved to my lungs. I had "CHOP" chemotherapy and have been in excellent health for 18 months now. I was told that this cancer has no actual cure but it can be held at bay very successfully. From my knowledge the reason there can be no cure is that for me it is not a "localized" cancer i.e. it is evident both in my blood and bones and major organs. As such it could not really be operated on to remove it as in the case of a localized tumour. Fortunately for me the lymphoma was low grade (meaning that my cancer cells were not too different to ordinary cells) and as such my chemo. was very successful and not difficult at all. In fact I swam 10 kilometres (not all at once!) whilst having chemo. over several months. I have also adopted a cancer prevention lifestyle.
I would suggest that in your case if your husband is being treated with antibiotics then this is promising as from my reading this may effect a cure. It was only relatively recently that doctors discovered that some people can really benefit from this approach although I was unable to due to their inability to detect the particular bacterium (I think it was a bacteria,from memory)that would have called for such a treatment.
The "wait and see" approach is more often adopted with people whose symptoms are not causing too many difficulties but as my breathing and loss of appetite were severe that was not possible with me.
Go to recommended medical websites,find out what you can and join an ongoing cancer education/support group.The hardest part of cancer for me has been living with the knowledge that it may return and I think only now (18 months after the end of my treatment) have I been able to conquer these fears. I am now living a "fearless" life (which I am certain is very important for my health,immune function etc.) and as such a much happier life than most people.I have not actually explored any "alternative" treatments.
I am happy to provide you with any further information you may need. I still believe in a cure even if the doctors cannot.