when used in the immunoperoxidase tissue-staining procedure , the monoclonal antibody reacted with the syncytiotrophoblastic cells in sections of all early placentas ( less than 15 weeks of gestation ) , blighted ova and benign ( hydatidiform mole ) or malignant placental tumors ( destructive mole , choriocarcinoma ) .
C0032043
placentas
C0153572
malignant placental tumors