What is cancer?
Our bodies are made up of lots of cells, which make the things we need such as blood, muscle and bone. Cancer happens when some of our cells stop working properly.
It's very unusual for children to get cancer, and doctors don't know what causes it. It's a serious illness but doctors are really good at helping children get better from it.
Children with cancer need to go to hospital for treatment, and need time to recover at home. This means they will be off school, sometimes for a short time and sometimes for a long time.
Everyone with cancer reacts differently to treatment, but most children get better.
Find out more
If you want to know more about a specific type of cancer and how it is treated, you can look at our pages about different types of cancer.
How cancer affects you
We also have lots of information and guidance about how cancer affects different parts of your life. You can read about topics including school, friends and family, here.
Last reviewed: September 2015
Next planned review: 2018