Abstract
The importance of achieving a very good partial response or better (≥VGPR) after induction treatment of myeloma has traditionally only been discussed in the context of high-dose therapy with auto-SCT (HDT/auto-SCT). Of late, the advent of novel agents for induction treatment has resulted in improved CR and VGPR rates, which are comparable with those observed with HDT/auto-SCT. We show that in an unselected group of 179 myeloma patients with diverse baseline characteristics, and treated with different modern induction regimens within a single institution, the attainment of ≥VGPR with or without HDT/auto-ASCT represents a major surrogate marker of better clinical outcomes. On the basis of a 1-year landmark survival analysis, patients achieving ≥VGPR enjoy a significantly longer PFS, which translated to a longer OS. Superseding the adverse effects of advanced age, high International Staging System (ISS) stage, adverse cytogenetics and independent of the transplant status, the attainment of ≥VGPR emerged as the single most significant predictor of long-term survival on multivariate analysis.
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