Background Most patients with chronic idiopathic thrombocytopenicpurpura have a response to corticosteroids or intravenous immuneglobulin, but improvement is often transitory. Splenectomy mayprovide only a short-term benefit. Because pulsed high-dosetherapy with potent synthetic corticosteroids is inexpensive,well tolerated, and effective in patients with secretory B-cellneoplasms, a similar regimen was examined for its efficacy inpatients with chronic idiopathic thrombocytopenic purpura thatwas resistant to other treatments.
Methods Ten consecutively referred patients who had persistentsymptomatic idiopathic thrombocytopenic purpura after undergoingat least two standard therapies were treated with six cyclesof dexamethasone (40 mg per day for 4 sequential days every28 days).
Results All patients had increased platelet counts (mean [±SD]count before treatment, 12,000 ±8200 per cubic millimeter;after treatment, 248,000 ±130,000 per cubic millimeter).The platelet counts remained above 100,000 per cubic millimeterfor at least six months after the last cycle of treatment. Therewere no serious side effects. Features of hyperadrenocorticismdue to prior corticosteroid therapy resolved during treatment.The cost of the drug was approximately $100 per patient.
Conclusions Although the possibility of spontaneous remissionand a delayed benefit from prior therapy cannot be excludedin this small group of patients, pulsed high-dose treatmentwith dexamethasone may provide a low-cost therapeutic optionwith minimal side effects in patients with refractory idiopathicthrombocytopenic purpura.
Source Information
From the Divison of Hematology and Oncology, Department of Internal Medicine, Wayne State University School of Medicine and Harper Hospital, Detroit.
Address reprint requests to Dr. Andersen at 403 Violet S., Harper Hospital, 3990 John R St., Detroit, MI 48201.
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