What is acute lymphoblastic leukemia?
Acute lymphoblastic leukemia (ALL) is a cancer of the white blood cells that normally fight infection. The cells do not grow and develop properly, filling up the bone marrow inside bones, where blood is normally made.
ALL is the most common type of childhood cancer, accounting for 35% of all cancers in children. Each year, there are about 2,900 new cases of children and adolescents diagnosed with ALL in the United States alone.
Its signs and symptoms resemble other common illnesses, which often leads to other treatments before the leukemia diagnosis is made.