Acute Lymphocytic Lukemia information please?

ALL, it's pretty rare but is the most common type of leukaemia in children. It is more common in boys than girls. They don’t know what causes most cases of leukaemia. But there are some things, for example the only really major risk factor that we know of is being exposed to high levels of radiation. Survivors of the atomic bomb explosions in Japan had higher than normal levels of leukaemia. Other possible risk factors include exposure to benzene, past chemotherapy, some genetic conditions and a virus linked to a very rare type of ALL.