ghost villi

Rounded, pale eosinophilic masses seen by light microscopy which may be surrounded by inflammatory cells and correspond to chorionic villi in placental infarction; ghost villi may also be seen with retained products of conception—missed abortion

ghost villi

Obstetrics Rounded, pale eosinophilic masses seen by LM that are surrounded by inflammatory cells and correspond to chorionic villi in a placental infarction; ghost villi may also be seen with retained products of conception–missed abortion.
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As time passes the nuclear chromatin within the cells of villi becomes clumped and eventually fades away leaving pink acellular villi (ghost villi) and increased surrounding fibrin leading to increased calcification, with some evidence of hypermaturation (distal villous hypoplasia and increased syncytial knots)11.
Later changes include necrotic changes (pyknosis and karyorrhexis of trophoblast), loss of trophoblast nuclear staining, and eventually ghost villi.