Acute lymphoblastic leukemia (ALL) is a cancer of the lymphoid line of blood cells characterized by the development of large numbers of immature lymphocytes. Symptoms may include feeling tired, pale skin color, fever, easy bleeding or bruising, enlarged lymph nodes, or bone pain. As an acute leukemia, ALL . Welcome to All 4, the UK’s biggest free streaming service, just voted Best On Demand Service ! STREAM + SHOWS FROM CHANNEL 4 Watch top UK TV series, hit US box sets, world drama .