Standard induction and low dose ara-C treatment in patients over 60 with AML or MDS.

In this retrospective study, 61 induction treatment periods in 57 patients with myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML) were evaluated. According to the WHO performance status, 6 patients received no chemotherapy, 20 had low dose cytosine arabinoside (LD ara-C) induction courses, and 35 received standard induction consisting of daunorubicin and cytosine arabinoside. Untreated patients had a poor survival. Of the 20 patients with LD ara-C induction courses, 4 (20%) achieved complete remission (CR). Three patients (15%) died during induction. Of 35 patients with standard induction, 21 patients (60%) achieved CR. Toxicity was considerable - 11 patients (31%) dying during treatment. We conclude that patients over 60 yr of age with RAEB, RAEB-t or AML had a CR rate and survival comparable to those of younger patients if treated with standard induction chemotherapy at the cost of serious therapy-related complications. In patients who were judged not to be able to tolerate standard induction and who were subsequently treated with LD ara-C, complications occurred less frequently, but the CR rate was low and survival short.