- Confirmed diagnosis of relapsed/refractory AML (defined as >=5% marrow blasts by morphology), including MDS, with persisting rising blasts and no other comparable or satisfactory alternative therapy available. If bone marrow has <5% blasts by morphology but the patient has evidence of relapse with extra-medullary disease progression. In select cases presenting with conversion of MRD from negative to positive, treatment with GO may be allowed where no alternative treatments are feasible.