Chronic lymphocytic leukaemia (CLL)

Chronic lymphocytic leukaemia (CLL) is a slow-growing type of blood cancer. It develops when white blood cells called lymphocytes stop working properly and grow out of control. Find out about the signs and symptoms of CLL, tests you might have, and how CLL is diagnosed.

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Download our booklet about CLL

If you don’t have any symptoms of chronic lymphocytic leukaemia (CLL) or your symptoms are not causing you problems, you might not need treatment straight away. Instead, you might be monitored through regular check-ups and blood tests. This is called active monitoring or 'watch and wait'. Treatment is still available when you need it. Find out more about active monitoring, what it is and why it is used.

Learn more about active monitoring

Chronic lymphocytic leukaemia (CLL) is generally very treatable. The main treatments are usually targeted medicines designed to attack CLL cells. Some people have antibody therapy alongside a targeted medicine. Find out about your treatment options and how supportive care can help you too.

Learn more about treatments for CLL

Download our factsheet on CLL treatments

Order or download free factsheets, leaflets and booklets about CLL.

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