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The placenta is enlarged (relative to the size of the uterine cavity) and anteriorly located, reaching the fundus superiorly and the edge of internal cervical os inferiorly. There are extensive internal cystic spaces characteristic of 'molar placenta'.
The amniotic cavity shows an internal fetus with evidence of hydrocephalus and marked ascites.
The outer myometrium appears smooth with no evidence of gross invasion. However, it appears hypervascular with extensive tortuous vessels.