My wife wants to know why some children can get cancer and some children don't.?

why do some people get cancer and some never do ? just like with children.

In 1990, I had Hodgkin's Lymphoma, stage 3-B, but I've survived. My doctors were great people, but they were limited to surgery, chemo and radiation by profitable AMA treatment policy. During the year in treatment, I started learning about alternative medicine. I'm a retired engineer, and this is what I've pieced together--our IMMUNE SYSTEMS become weakened by poor nutrition, lack of exercise and reduced oxygen. Once that happens, our body becomes vulnerable to common STRESSORS. Stressors can be environmental, like viruses, heavy metals, pesticides, food additives, electromagnetic waves or pollution. They can be internal things like emotional or job stress, or poisonous people in our lives. Aging is also a contributing factor. So this means:

WEAK IMMUNE SYSTEM + STRESSORS = DISEASE (cancer, diabetes, heart disease, etc.)

Our bodies have 60 trillion--yes, trillion--cells, and there are always some mutating into cancer cells, but a healthy immune system kills them before they have a chance to get a foothold in the body.

It takes a LONG time, usually, or a high level of stressors, to weaken the immune system to the point where it won't do its job, but once cancer has formed, it will generally spread rapidly.

Genetic predisposition (ex. both parents have skin cancer), environmental factors (ex. working next to a chemical factory), individual health (ex. eating style, obseity, smoking) are all factors.

For kids it's mostly environmental and genetic predisposition. Birth defects can also play a role.

Genetic reasons, evironment plays part of it too.

That's the $64,0000 question!!!!!
No one really knows why, they say that every one will get cancer at least 10 times in their life time. Most of the cancer cells are fought off by our immune system. I was told that diet plays a huge part of why we end up with cancer. The body just wasn't meant to eat junk. When God made us he didn't expect us to eat the foods that we do. Think about what was eaten 2000 years ago. Mostly fish, veg, and fruit.
I'm a 13 year cancer survivor.

if we knew that, there wouldn't be any cancer at all.

There's no real answer.

I was diagnosed with cancer when I was 9, and after radiation, chemotherapy, and surgery to remove the remains of the tumor, I have lived more than 20 years.

I have often wondered why me, why not others? Why did I survive, when others I knew did not?

My Oncologist told me that everone will get cancer if they live long enough - it's just that something else kills some people first!