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Acute lymphoblastic leukaemia
A type of cancer of the blood and bone marrow that affects white blood cells.
Acute lymphoblastic leukaemia is the most common childhood cancer. It occurs when a bone marrow cell develops errors in its DNA.
Symptoms may include enlarged lymph nodes, bruising, fever, bone pain, bleeding from the gums and frequent infections.
Treatments may include chemotherapy or targeted drugs that specifically kill cancer cells.