using an enzyme-bridge immunoperoxidase method , pregnancy specific beta1-glycoprotein ( psbetag ) has been demonstrated in the cytoplasm of the trophoblast in several formalin-fixed tissues , namely , implantation sites of ovum , normal placentae , hydatidiform moles , invasive moles , and choriocarcinomata of uterus and testis .
C0020217
hydatidiform moles
C0008493
invasive moles