An acute lymphoblastic leukemia occurring during childhood. The majority of cases are B-acute lymphoblastic leukemias. Approximately 15% of the cases are T-acute lymphoblastic leukemias. The disease is childhood acute lymphoblastic leukemia (MONDO_0000870, a Monarch Disease Ontology entry). Also known as: childhood ALL, childhood acute lymphocytic leukaemia, childhood acute lymphocytic leukemia, childhood acute lymphogenous leukaemia, childhood acute lymphogenous leukemia, childhood acute lymphoid leukaemia, childhood acute lymphoid leukemia, childhood precursor lymphoblastic leukaemia.