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This protocol has been superseded because it is not commonly used in clinical practice.
Evidence and Efficacy
The addition of a number of cycles of consolidation therapy, which is similar to induction therapy at somewhat reduced doses, or maintenance therapy after 7+3 induction therapy has been shown to improve median complete remission (CR) duration from 7 to 8 months to 8 to 18 months and long term response rates from 10% to 20-30% in non-randomised studies.r It does not appear that addition of maintenance therapy after consolidation therapy improves response rates.r
Two cycles of DAT consolidation therapy (equivalent to 5+2 + thioguanine) followed by maintenance therapy were compared to maintenance therapy alone after achievement of CR with the DAT regimen and there was no improved median CR duration (40 weeks with consolidation versus 34 weeks with maintenance), or overall median survival 72 weeks with consolidation versus 87 weeks with maintenance However, there were different plateaux in probability of remaining in CR at 2 years being 28% in the consolidation arm versus 14% in the maintenance arm which was not significant due to small numbers.r
In a SAKK study, 3 cycles of early consolidation therapy (cytarabine, daunorubicin and vincristine) improved the median survival of patients entering remission from 1 year (based on a previous SAKK study) to 2.5 years but there was no benefit from maintenance therapy after the consolidation therapy with median remission duration of 18 months and median survival of 30 months in both observation and maintenance arms.r
There do not appear to have been randomised trials comparing 5+2 consolidation therapy to other post remission therapies, although 5+2 and 5+2 modified consolidation therapy have been used in a number of trials after 7+3 and 7+3 modified induction therapy using the same anthracycline in consolidation therapy as induction therapy.r
A search of the literature found limited evidence to support the use of cytarabine and daunorubicin 5-2 in the consolidation treatment of AML. The expert reference panel supported publication of the protocol on the basis of the information summarised below. The committee was most strongly influenced by the study by Wiernik el al.r
Source |
Study & Year Published |
Supports Use |
Is the dose and regimen consistent with the protocol? |
Comments |
Randomised trials |
Wiernik et al. 1992 |
Yes |
No |
Daunorubicin 45 mg/m2 days 1-2 and cytarabine 100 mg/m2 days 1-5 for 2 cycles |
|
Cassileth et al. 1992 |
Yes |
No |
" |
Observational studies |
N/A |
N/A |
N/A |
- |
Case series |
N/A |
N/A |
N/A |
- |
Guidelines |
Date published/revised |
Supports Use |
Is the dose and regimen consistent with the protocol? |
Comments |
NCCN |
Mar 2014 |
Yes |
N/A |
- |
BCCA |
N/A |
N/A |
N/A |
- |
ESMO |
2013 |
N/A |
N/A |
- |
Toxicity
There was an increased incidence of dysphagia occurring in 15% of patients receiving idarubicin versus 0% in patients receiving daunorubicin but otherwise toxicity was similar in both groups during consolidation therapy in the Wiernik study.r There was an increased incidence of diarrhoea, hyperbilirubinaemia, elevation of transaminases, alkaline phosphatase and urea, infections and more prolonged myelosuppression in idarubicin arm compared to daunorubicin arm in consolidation therapy in the Vogler study.
Haematological toxicity during consolidation therapy:r

© Blood 1992