In a retrospective analysis of 24 children with refractory or multiply relapsed acute lymphoblastic leukemia (ALL), a salvage regimen comprising amsacrine, etoposide, and high-dose methylprednisolone AEP achieved a significant treatment response in 11 of 19 evaluable patients (8 complete and 3 partial remissions). Five of 9 AEP-responsive patients who underwent subsequent stem cell transplantation are alive (median follow-up: 43 months; range 10 to 91). The load of minimal residual disease prior to transplantation appears to be predictive for outcome in this very poor-prognosis subgroup of ALL.
