Fetal Thrombotic Vasculopathy

Fetal thrombotic vasculopathy (FTV) is the term used to encompass the histologic findings identified in placentas with fetal thrombotic lesions: occlusive and nonocclusive chorionic vessel thrombi, avascular villi in the distribution of a single villous tree, intramural vascular fibrin, and hemorrhagic endovasculitis. The underlying etiology of FTV is largely unknown though hypercoagulability and circulatory stasis have been the main focuses in the literature to explain the hemostatic abnormalities. This article reviews the literature in both defining and discussing, potential etiologies of FTV, as well as neonatal outcomes.