Summary of Findings Gestational-type endometrium with Arias-Stella reaction Diffuse enlarged and hydropic chorionic villi Multiple chorionic villi with large central cisterns Mostly uniformly enlarged chorionic villi, rare small villi, almost no fibrotic villi Circumferential proliferation of variably atypical trophoblastic cells around occasional villi No fetal tissue identified Lots of tissue present for evaluation
