John, the same thing did carry off my Dad some 5 years ago, BUT;
Soon after my mother was diagnosed with Lymphoma (C of the lymph system)
I researched a fair bit and came across the work of Johanna Budwig (she was an accomplished Boichemist and Pharmacist). It centres on the function of the body at a cellular level and .
However lets put the theory aside for a minute, especially as I have no real understanding of it!
My mum had radio for the tumour, which cured the immediate problem. I could not get her to follow the full Budwig diet, but she would eat flapjacks made from cold pressed flax oil
At the same time she had a growing problem with warts on her hands, which the doctor said she would have to live as she was 80 and her immune system was getting too old to deal properly with them.
After less than two months the warts had mysteriously all cleared up. She is now 84 and clear of the lymphoma, to the point that if it were to reoccurre it would be classed as an entirely new instance.
Second data point: My 6yo daughter developed a verruca on the foot, which I treated with conventional methods recommended by the nurse. After some months I took her to a chiropodist who told me they are caused by the Human Pappiloma virus and it was just a waiting game as to when her immune system would formulate a reponse that would work. Again she would not accept too much from the Budwig diet, but I got her on the flapjacks (or flaxjacks) about three weeks ago , and this morning after a long bath the verucca came loose and fell off, leaving a 5mm round and 1mm deep cavity with clear new skin growing behind. We were told to expect anything up to a year to get to this point.
I have no doubt that Flax oil boosts the immune system. Two cases in my family has to be more than coincidence. It may be capable of much more.
Personally I take the oil mixed with Quark, it makes a refreshing dessert once a week. Quark is NOT the same as cottage cheese.
I really recommend the recommenadations that arise from Budwigs work ,. I know your condition is serious, but who knows , my pnilosophy is - you are what you eat. Please read up on it and consider giving it a go.
http://www.cancertutor.com/budwig/
https://www.flaxfarm.co.uk/shop/
https://www.flaxfarm.co.uk/product-category/flaxjacks/
https://en.wikipedia.org/wiki/Quark_%28dairy_product%29