A 54-year-old man was admitted for tenosynovitis of the wrists, olecranon bursitis, stiffness, progressive flexion of the fingers, subcutaneous nodules, and persistent blood eosinophilia. A high eosinophil count was detected in his synovial fluid. We review the literature on idiopathic hypereosinophilic syndrome. This case provides evidence that nonerosive polyarthritis with periarticular involvement and nodules can be manifestations of this syndrome.

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