A phase 2, multicenter, multi-cohort, open-label study of pomalidomide in combination with low-dose dexamethasone or pomalidomide in combination with low-dose dexamethasone and daratumumab in subjects with relapsed or refractory multiple myeloma following lenalidomide based therapy in the first or second line setting.~This trial will assess, Overall Response Rate (ORR), Overall Survival (OS), Progression-Free Survival (PFS), Duration of Response (DoR), Time to Response (TTR), Time to Progression(TTP) and safety.
This trial will evaluate the efficacy and safety of combination of pomalidomide (POM) and low-dose dexamethasone (LD-Dex) (Cohort A) or the combination of pomalidomide (POM) , daratumumab (DARA) and low-dose dexamethasone (LD-Dex) (Cohort B) in subjects with relapsed or refractory multiple myeloma who have received a first or second line treatment of lenalidomide-based therapy.~This trial will test the hypothesis for Cohort A that the proportion of patients will have an Overall Response Rate (ORR) of > 30 % to reveal that Pomalidomide is efficacious in pretreated patients who are refractory to lenalidomide.~This trial will test the hypothesis for Cohort B that the proportion of patients will have an Overall Response Rate (ORR) of > 70 % to reveal that POM+DARA+LD-Dex is efficacious in pretreated patients who are refractory to lenalidomide.~This trial will test the hypothesis for Cohort C that the proportion of patients will have an Overall Response Rate (ORR) of >60% to reveal that POM+DARA+LD-Dex is efficacious in pretreated patients who are refractory to lenalidomide. This treatment will be in only Japanese patients.