Many of us have tumors growing inside us right now. While most people develop cancer,

slowing its growth can help us unknowingly live with it rather than die from it. Watch

the video to learn more. One cancer cell never hurt anyone.

Two cancer cells never hurt anyone.

But a billion cancer cells, that's when we start getting into trouble.

So we have to slow, even reverse the division and growth of cancer cells.

We all have cells that could grow into tumors, but if we slow them down, our immune systems

may have a chance to clean them up before they hurt us. Take breast cancer, for example,

the most common internal cancer among American women. Like all cancers, it starts with a single cell.

This is a photomicrograph, a photograph taken under a microscope of an actual breast cancer

cell, which then divides and becomes two cells, then four, then eight, and so on.

Every time the cells divide, the tiny tumor doubles in size. It only needs to double about 30 times, and we're up to a billion cancer cells,

which is a tumor just large enough to be felt and picked up by mammography.

Even though a tumor only has to double 30 times,

it may take anywhere from about 50 days to a thousand days for a

cancer cell to double just once. So that means from the time that first cell mutates,

it takes between a few years and nearly a century before it grows to show up as a little

tumor we can see. The shortest known interval between exposure to a carcinogen and the development

of cancer is about 18 months, which is when some of the first leukemia cases started

appearing after Hiroshima. Cancers need time to grow, and for most solid tumors,

meaning non-blood tumors, cancer takes decades to develop. Check it out.

The ovarian cancer you get diagnosed with at the average age of 62 started growing 44 years

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