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This section is for teenagers and young adults and is about a type of cancer called acute lymphoblastic leukaemia (ALL).
We also have more info about:
If you’re looking for information about ALL in people of all ages, please see our general ALL| section.
Leukaemia is a cancer of the white blood cells. In leukaemia, the process for making new white blood cells gets out of control and immature white blood cells (called blasts) keep being made.
They build up in the bone marrow until there isn’t enough room for the bone marrow to make healthy white blood cells, red blood cells and platelets. The body needs these cells to help us fight infection, carry oxygen from the lungs around our body and to stop us bleeding when we cut ourselves by clotting our blood.
This information is about a type of leukaemia called acute lymphoblastic leukaemia. The other type of leukaemia that can affect teens and young adults is acute myeloid leukaemia|. If you have a different type of leukaemia and want to know more, please contact us|.
Many of the symptoms of ALL are caused by having fewer than normal healthy blood cells in the body. Symptoms can include:
If you have any of these symptoms, or are worried that you may have ALL, the first thing to do is see your family doctor (GP). They will examine you and refer you onto a hospital if they think you need to see a specialist doctor.
We don't know exactly what causes ALL, but research is going on to try to find out.
Young people with some genetic conditions, such as Down's syndrome, are at an increased risk of developing ALL. A genetic condition is something you are born with.
If you think you have some of the symptoms of ALL you should go to your GP. They can talk to you about your symptoms and arrange any tests| they think might be needed.
Content last reviewed: 1 August 2012
Next planned review: 2014
For answers, support or just a chat, call the Macmillan Support Line free (Monday to Friday, 9am-8pm)
If you have any questions about cancer, need support or just want someone to talk to, ask Macmillan.
You can talk to young people who are living with and after cancer in our special Online Community group for people who are 16-24.
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© Macmillan Cancer Support 2013
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