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Villitis of unknown etiology, abbreviated VUE, is an inflammatory process that involves the chorionic villi (villitis) whose cause (etiology) is not known. VUE is associated with recurrent miscarriage and intrauterine growth restriction, and recurs in subsequent pregnancies.
Histopathology
Histomorphologically, VUE is characterized by a lymphocytic infiltrate of the chorionic villi without a demonstrable cause. Plasma cells should be absent; the presence of plasma cells suggests an infective etiology, e.g. CMV infection.
References
Villitis of unknown etiology Wikipedia(Text) CC BY-SA