Acute lymphoblastic leukaemia (ALL) is a rapidly progressing type of leukaemia.
In the UK, there are 830 new ALL cases per year. 490 children are diagnosed (aged 0-19) and around 340 adults (aged 19+). The peak incidence in children is 0-4 years old.
ALL can develop at any age but, unlike most types of cancer, it is most common in children. It affects young adults, but the incidence in adults increases with age. ALL is slightly more common in men than in women.
For further reading on acute lymphoblastic leukaemia, please download a booklet from the Leukaemia Care website here.