<prompt> Lasparaginase is particularly used in which type of leukemiaAMLCMLALLCLL  <response>: Treatment of ALL Treatment of ALL is divided into 4 stages.Induction to attain remissionCNS therapy to prevent CNS spreadIntensification ConsolidationMaintenance Continuation therapyThe total duration oLtreatment ranges between 2 and 212 years.1. Induction of remissionInduction therapy is used to attain remission, i.e., to eradicate the leukemic cells from bone marrow.Drugs used are Vincristine, Prednisolone, L Asparginase, AnthracyclineDuration of therapy is 4-6 weeks.2. CNS therapyMost children with leukemia have subclinical CNS involvement at the time of diagnosis.Moreover, CNS acts as a sanctuary site where leukemic cells are protected from systemic chemotherapy because of blood brain barrier.So, treatment to keep leukemia cells from spreading to the CNS is often started with induction.Treatment include Intrathecal methotrexate plus cranial radiation.3. IntensificationIf the patient goes into remission, the next step is to intensify the therapy for a short period.Drugs used are Methotrexate, L - Asparginase, Epipodophyllotoxin, Cyclophosphamide, Cytarabine4. Maintenance therapyAfter consolidation, the patient is generally put on a maintenance therapy to maintained the remission state and prevent relapse.Drugs used are 6-mercaptopurine, Methotrexate, Prednisolone, VincristineDuration of maintenance therapy is 2-2.5 years. 