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Cancer treatment myths: Any truth to these common beliefs?

Myth: If we can put someone on the moon, we should have cured cancer by now

Truth: Finding the cure for cancer is very complicated. In some ways, it's harder than figuring out the engineering and physics needed to go to space.

Cancer includes a large group of diseases. Each person's cancer could have many possible causes. Even with more information about cancer diagnosis and treatment, healthcare professionals still have a lot to learn about why cells become cancer cells and why some people who have cancer do better than others.

Also, cancer cells can change even after someone is diagnosed with cancer. This may lead to chemotherapy medicines or radiation treatments no longer working on cancer cells after a while, even if the medicines did seem to work at first.