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A multicenter prospective study on the treatment of chronic idiopathic thrombocytopenic purpura
1Third Department of Internal Medicine, Nippon Medical School, Tokyo, Japan.
Insights
Corticosteroids offer limited sustained remission for chronic idiopathic thrombocytopenic purpura (ITP). Splenectomy shows higher remission rates, while immunosuppressants have transient effects. Careful monitoring is crucial due to infection risks.
Area of Science:
- Hematology
- Clinical Medicine
- Pharmacology
Background:
- Chronic idiopathic thrombocytopenic purpura (ITP) poses treatment challenges.
- Establishing effective therapeutic guidelines for ITP is crucial.
Purpose of the Study:
- To develop an improved therapeutic guide for chronic ITP.
- To evaluate the efficacy and safety of different ITP treatment modalities.
Main Methods:
- Multicenter prospective study involving 247 eligible patients.
- Follow-up of 175 patients with a median duration of 55 months.
- Analysis of treatment outcomes for corticosteroids, splenectomy, and immunosuppressive agents.
Main Results:
- Sustained complete remission achieved in 13.1% of patients treated with corticosteroids.
- Splenectomy resulted in remissions in 52.5% of patients at 12 months post-operation.
- Immunosuppressive agents showed low response rates and transient effects; slight improvement observed in untreated patients.
- Most deaths were unrelated to thrombocytopenia, but five treatment-related deaths occurred due to infection.
Conclusions:
- Corticosteroids have limited efficacy for sustained remission in chronic ITP.
- Splenectomy is a more effective treatment option for achieving remission.
- Immunosuppressive agents are largely ineffective; careful consideration of infection risks associated with treatments is necessary.
Abstract:
A multicenter prospective study on the treatment of chronic idiopathic thrombocytopenic purpura (ITP) was conducted by the Idiopathic Disorders of Hematopoietic Organs Research Committee (IDHORC), the Ministry of Health and Welfare of Japan. The aim of the study was to establish an improved therapeutic guide for chronic ITP. Of the 247 eligible patients 175 have been followed up to the present time, 16 patients have died, and 56 have been lost to follow-up. The median follow-up time was 55 months (range: 1 to 91 months). Of the 206 patients treated with corticosteroids, 13.1% achieved sustained complete remission. Splenectomy produced remissions in 52.5% of 72 patients evaluated 12 months after operation. Eighty-five patients were treated with immunosuppressive agents, but the response rates were low and the effect was transient in most cases. In the patients followed up without any specific treatment, the mean platelet counts showed slight improvement. Of the 16 patients who died during the observation period, only one died of bleeding; the remaining 15 died of causes unrelated to thrombocytopenia. It is noteworthy that five patients who were treated with corticosteroids or immunosuppressive agents died of infection.