Study details
The ALL0434 trial enrolled patients aged 1-30 years with newly diagnosed T-ALL or T-LL. After induction chemotherapy, all patients received standard chemotherapy, the Children’s Oncology Group augmented Berlin-Frankfurt-Munster regimen (N Engl J Med. 1998;338:1663-71), and depending on recurrence risk, cranial irradiation.
In addition to that regimen, they were randomly assigned to four arms, according to methotrexate dosing (high dose with leucovorin rescue in the inpatient setting vs. escalating dose in the outpatient setting) and nelarabine therapy (receipt vs. nonreceipt).
Among patients with T-ALL, those with low-risk disease were ineligible for nelarabine and did not receive cranial irradiation, whereas those with intermediate- and high-risk disease were randomized to all four arms, Dr. Dunsmore explained. In addition, those who did not achieve remission on induction chemotherapy were nonrandomly assigned to the high-dose methotrexate plus nelarabine arm.