Eosinophilia and Thrombophilia in Churg Strauss Syndrome: A Clinical and Pathogenetic Overview

Abstract

During the past decade, there has been an increased description of Churg Strauss syndrome (CSS) characterized by vascular occlusions possibly linked to the thrombogenic potential of the eosinophil that is poorly appreciated. The purpose of this overview is 3-fold: the first to evaluate the available prevalence of thrombosis in Churg Strauss series, the second to demonstrate that any vascular district may be affected, and the third to describe the pathogenesis of thrombosis in CSS. A Pubmed, EMBASE, and Google search of CSS series from 1951 to date revealed a prevalence of arterial occlusion ranging between 3.1% and 18.7% and a prevalence of venous occlusion between 5.8% and 30%, whereas a specific survey for venous thromboembolism in CSS yielded a prevalence of 8.1%. Eosinophils store and release tissue factor as well as other cationic proteins: the former initiates coagulation while the latter inhibits natural anticoagulant activity and activate platelets eventually culminating in excessive thrombin generation and clot formation. In addition, antineutrophil cytoplasmic antibodies may shift the endothelial lining to proadhesive and prothrombotic surface. It is hoped that the review will represent a basis to foster novel research on this topic.

Keywords

clinical thrombophilia hypercoagulability venous thromboembolism

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