article_snippet.sent: Acute Lymphoblastic Leukaemia affects a person's white blood cells.
article_snippet.sent: White blood cells are the important infection-fighting part of the immune system, made in your bone marrow.
article_snippet.sent: Patients with leukaemia produce an abnormal number of immature white blood cells which 'clog up' Patients with leukaemia bone marrow.
article_snippet.sent: This stops bone marrow making other blood cells, which are vital for a balanced immune system and healthy blood.
article_snippet.sent: Acute leukaemia comes on suddenly, progesses quickly and needs to be treated urgently.
article_snippet.sent: Chronic leukaemia develops more slowly, over months or years.
article_snippet.sent: Common treatments for leukaemia include chemotherapy, radiotherapy or a bone marrow transplant.