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The European Hematology Association’s annual congress (EHA 2021) is one of the most important haematology congresses in Europe and it is taking place from 9 to 17 June. 


Results from Part 1 of the CASSIOPEIA phase-3 study compared the addition of daratumumab to bortezomib, thalidomide, and dexamethasone (D-VTd) induction/consolidation with VTd alone in transplant-eligible patients with newly diagnosed myeloma has been presented.

The results of the study showed superior efficacy of D-VTd over VTd alone in combination with autologous stem cell transplantation (ASCT), which led to the regulatory approval of the treatment. Here, we present the results from the CASSIOPEIA part 2 interim analysis aimed to compare daratumumab maintenance (16 mg/kg every 8 weeks) with observation treatment in all 886 responders from part 1 of the study.


Our interim analysis showed that patients maintained with daratumumab exhibited significantly longer progression-free survival (PFS) compared to the observation treatment arm. However, stratification of the patients by induction/consolidation treatment revealed that this benefit only appeared in patients previously treated with VTd in CASSIOPEIA part 1. Patients who received D-VTd in part 1 and were placed on daratumumab maintenance showed comparable PFS to the observation group. Furthermore, daratumumab maintenance led to a significantly higher depth of response and no new safety signals were detected. In summary, daratumumab maintenance is beneficial for patients after ASCT who received VTd induction/consolidation.

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