13 full remissions and 8 partial remissions were achieved in 32 first treatments of acute leukaemia. The average duration of full remissions amounted to 225 days, that of partial remissions was 140 days. The average survival time of responders amounted to 410 days, that of non-responders was 52 days. The results of 18 recidive treatments were distinctly worse. Allowing for alexane permanent infusion, the findings and complications of different therapeutical schemes were compared. Improvements of the results seem to be only possible, if cytostatic treatment is supplemented by taking initial and progress evaluating, prognostic relevant parameters into consideration (e.g. stem cell cultures), and by escalating supportive measures including histocompatible blood cell substitution and reverse isolation as well as transplantation of human bone-marrow.