Hey Blu, cool nickname 
I took advanced placement bio, then BIO in college as I thought about being a doctor. I ended up with an English degree, but not without several BIO classes on my resume, so although I am not an expert, I can tell you a few things that ARE the TRUTH about how the body works and how cancers form:
So, think of your cells being tiny, perfect machines, each doing their part to make a bigger machine work, like spokes in a wheel or wheels on a long, long train.
Now, think of that cell replicating for YEARS, never failing to make a perfect example of itself EVERY. SINGLE. TIME. Without fail. (Cells last about 30 to 200 days, depending on the type of cell it is....so over a lifetime, that a LOT of replications....).
Now, say that single cell messes up its replicating code ONCE. And -- to make this even more juicy -- cells have MILLIONS of codes to decipher just to replicate once! No kidding.
So, now the cell has messed up. Now, all cells following will mess up. Without fail. EVERY. SINGLE. ONE. Why? Because that is what the previous cell did, and all cells follow the codes of all previous cells!
Maybe these cells are weak because the codes are wrong, and they soon die off. Other, healthier cells take their place This happens. It's happening to you RIGHT NOW. That is the normal progression of things, the "failsafe" so to speak, of our bodies.
But, sometimes -- very rarely -- for only about 2% of the entire population on the planet has cancer at any given time -- those mis-coded cells do not die off. They are stronger. They grow faster. They invade other cells around them, instead of the other way around. They are ravenous. They replicate faster, and they need more resources to work faster. They never stop.
.....Welcome To Cancer.....
Now, do you really think that any human being on this planet knows how to stop EVERY CELL from replicating badly??? And, do you think that they would keep that secret if they had it, for IF they had it, then they also have the cure for EVERYTHING, because that means they can stop every bad cell from messing up the body.
That is too good to be true. You cure every cancer, you cure everything. Now, that is not to say that some cancers are aviodable most of the time: you don't smoke, you -- 99.9 percent of the time -- won't get lung cancer. If you eat right, your liver is healthier, etc. etc. That is true. After all, your cells are eating what you are putting into your body.
And, it also may be true that some people get "preferrable treatment" while others suffer...making it look as if someone knows the answer to something. But, most of the time, it's just politics working their way around the health system. Sure, there's some activity that's on the edge, you'd have a hard time proving otherwise, but CURING cancer? Nope.
Not unless you know how to make a perfect human specimen that can replicate every cell every time correctly without fail.
And -- believe me -- if someone had the answer to something that big they would cash in, because they would be infinitly the riches person in the world 
p.s. I have cancer. It bothers me to think there are those out there that believe someone is holding out on me. Call me biased. I'd rather be called realistic.
**WINK**