Presenting clinical features such as age and initial white count have long been recognized as having prognostic significance. The most favorable age at presentation is 1-9 years, and white blood count is 50,000/mm3) and central nervous system involvement in association with a mixed-lineage leukemia (MLL; 11q23) gene rearrangement of the leukemia cell . Despite intensive therapy, infants with an MLL gene rearrangement have a poor prognosis, with long-term event-free survival at 10% to 30% . An older age and white count of >50,000/mm3 are found in people with T-cell ALL, occurring more often among adolescent boys and blacks (pui et al., 2003). However, these children and adolescents treated with an intensive chemotherapy regimen have a favorable outcome similar with those with B-cell precursor disease.