Conditions: Hematology MDS Myelodysplastic Syndromes Thrombocytopenia
Keywords: Hematology MDS Myelodysplastic Syndromes Thrombocytopenia
Allocation: NON_RANDOMIZED | Intervention model: SINGLE_GROUP
Enrollment: 72
Healthy volunteers: no

Brief summary:
This is an open label extension study of romiplostim for treatment of thrombocytopenia (platelet count ≤ 50 x 10\^9/L) in MDS subjects. The study is designed to assess the long-term safety of treatment with romiplostim, as measured by incidence of overall adverse events, the incidence of bleeding events, the utilization of platelet transfusions, and the duration of platelet response. The study will further describe the time to disease progression to acute myeloid leukemia (AML) and survival.

Detailed description:

Arms:
arm 1: None

Interventions: intervention 1: Romiplostim (formerly AMG 531)
Intervention descriptions: intervention 1: Subjects will begin the study at an initial dose of 750 µg.

Except for:

* Subject whose doses were escalated to doses higher than 750 µg AMG 531 weekly, and maintained a response per IWG guidelines for platelet response.
* Subjects who were stable at a lower dose of AMG 531 on the previous study. Doses will be adjusted throughout the study based on individual subject's platelet count.

Protocol document: