Leukaemia is cancer of the white blood cells. White blood cells help your body fight infection. Your blood cells form in your bone marrow. In leukaemia, the bone marrow produces abnormal white blood cells. These cells crowd out the healthy blood cells, making it hard for blood to do its work.
Leukaemia can develop quickly or slowly. Chronic leukaemia grows slowly. In acute leukaemia, the cells are very abnormal, and their number increases rapidly. Adults can get either type;
There are different types of leukaemia, including:
Acute lymphocytic leukaemia
Acute myeloid leukaemia
Chronic lymphocytic leukaemia
Chronic myeloid leukaemia