tokens: Current treatment strategies in ALL include ( 1 ) tailoring therapy and its intensity to prognostic groups ; ( 2 ) multiple-drug combinations in induction ; ( 3 ) early use of intrathecal ( IT ) methotrexate ( MTX ) ; ( 4 ) CNS prophylaxis with IT MTX alone in good prognosis patients and combined cranial radiation ( CXRT ) , 1800 rads plus IT MTX , in average and poor prognosis patients .