Pathology report excerpt (placenta):
... Sharply demarcated from the normal villi are chorionic villi which show marked hydropic swelling with cistern formation. They have scalloped shaped outline and abnormal circumferential florid trophoblastic proliferation. There are focal piling up of syncytiotrophoblasts with large vacuoles. Cytotrophoblastic villous inclusions are seen. Stomal cell karyorrhexis is not a feature. p57 immunostain shows negative nuclear staining of the villous stromal cells and cytotrophoblasts but positive staining of the intermediate trophoblasts. Features are highly suspicious of a complete mole.
DIAGNOSIS:
TWIN GESTATION WITH HYDATIDIFORM MOLE COEXISTING WITH LIVE FETUS.