Chronic lymphocytic leukaemia (CLL)

Chronic lymphocytic leukaemia (CLL) is a cancer that affects the white blood cells called lymphocytes. It tends to develop very slowly.

Symptoms of CLL can include swollen glands, weight loss and infections that don't get better. Many people with CLL don't have any symptoms.

You usually start by seeing your GP and they might refer you to a specialist and organise tests. Find out more about tests and screening for CLL.

Survival depends on many factors including the stage of your CLL and whether there are changes in certain genes.

If you have very early stage CLL you may not need treatment straight away.

The stage means how far your chronic leukaemia has developed. There are 3 stages - A, B and C.

Research is looking into the causes and treatment of CLL. Find out about the latest UK research and how you can take part in trials.

There is support available to help you cope with a diagnosis of CLL.

We don’t know what causes most cases of CLL. But there are some factors that may increase your risk of developing it.