Cancer is a complicated thing. There are many, many variations, causes and triggers. I, too, have lost both of my grandparent on my father's side and my stepfather's parents both also died of cancer. An interesting thing, though, all four cases were caused by cigarette smoking. Stay away from them.
You should read the biography of doctor Jonas Sauk, the developer of the polio vaccine. For having given his cure to the world, he was blackballed by ever research laboratory in the nation. It was of his opinion, nearing his death, that he stated that he believed no other major diseases would ever be cured, simply because you couldn't satisfy the greed of the of the manufactures of the medicines at that time. And sadly it still appears so to this very day. I wish it appeared differently.
They will never cure cancer because the drug companies would lose way too much money! Just like the oil companies would lose too much money if there was ever an affordable, attractive car that didn't need fuel.
I know how hard it can be. I lost my horseback trainer due to brest cancer. She was like my 2nd mother and everyone at thunder bit stables loved her. She was only 50 years old and her name was Traci ;'(. But at the funeral I realized she is in a better place now where the cancer can't hurt her anymore<3
Cancer has been cured... but the drug companies would lose billions and billions, if i was made available. Its best to keep us sick and dying than to heal and save.... Giving the cure would put millions out of work, some drug companies too..... money is more important than a LIFE.