Table 1.

Differential diagnosis of fetal thrombotic vasculopathy

FTV Versus	Helpful Distinguishing Features
Intrauterine fetal death	•Fetal vascular changes appear generally uniform in all placental sections
Chronic villitis	•Patchy lymphohistiocytic infiltrate in villi •Inflammation in walls of thrombosed vessels
Mesenchymal dysplasia	•Extreme vascular distension: varicosities •Scattered large hydropic mesenchymal villi •Vessel proliferation