Combination Chemotherapy in Treating Children With Acute Lymphoblastic Leukemia
RATIONALE: Drugs used in chemotherapy work in different ways to stop cancer cells from dividing so they stop growing or die. Combining more than one chemotherapy drug may kill more cancer cells. It is not yet known which combination chemotherapy regimen is more effective for acute lymphoblastic leukemia. PURPOSE: Phase III trial to determine the effectiveness of combination chemotherapy in treating children who have newly diagnosed acute lymphoblastic leukemia.