I'm not a doctor, so I don't know the specifics of cancer development, but I have done some research on cancer cells. I find it fascinating that cancer starts as a simple mistake in the creating of cells in the human body.
Abnormal cells are created within the body and then the cells begin to grow and divide, forming polyps that can eventually turn into cancer. As the article stated, a person can have these abnormal cells long before colon cancer becomes deadly, and long before any colon pain is felt.
To me, this means we have a good window of opportunity to fight the disease before it develops, and in its early stages once it does develop.