this patient's uterus was increased in size compared to a 12 week uterus. she had grape like structures and no fetus. this would indicate a hydatidiform mole. this patient also had no fetal parts so it would be a complete mole.
according to pathoma, a hydatidiform mole is an "abnormal conception characterized by swollen and edematous villi with proliferation of trophoblasts"
also in a complete mole, most villi are hydropic and trophoblasts will proliferate diffusely around these hydronic villi.
the sheetlike masses of syncytiotrophoblasts would indicate a choriocarcinoma.