CASE REPORTS
JOURNAL ARTICLE
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[Efficiency of imatinib in polyserositis revealing a FIP1L1-PDGFRA-negative hypereosinophilic syndrome].

INTRODUCTION: Hypereosinophilic syndromes rarely manifest as polyserositis. Imatinib mesylate is the reference treatment for myeloid variants of FIP1L1-PDGFRA-positive hypereosinophilic syndromes. A response to imatinib has also been reported in FIP1L1-PDGFRA-negative hypereosinophilic syndromes.

CASE REPORT: We report a 25-year-old man who presented with a FIP1L1-PDGFRA-negative hypereosinophilic syndrome, with severe pericardial effusion and bilateral pleuritis. Imatinib mesylate at the dose of 100mg daily was started because of high-dose corticosteroids dependence. A response was noted after 15 days of treatment. Corticosteroids were discontinued after 7 months and the patient remained asymptomatic after 23 months of treatment.

CONCLUSION: This report evidences the association of polyserositis with hypereosinophilic syndromes and the potential efficacy of imatinib mesylate even in FIP1L1-PDGFRA-negative patients.

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