Early-onset preeclampsia, triploidy and fetal hydrops.

Early-onset preeclampsia (16-24 weeks) is frequently associated with fetal and placental anomalies. Hydatidiform mole, fetoplacental triploidy with partial molar changes and idiopathic hydrops fetalis are commonly associated ones. Two patients had severe, early-onset preeclampsia and ultrasonically documented fetal anomalies, one fetal triploidy, the other idiopathic hydrops with normal karyotype. The management of early-onset preeclampsia benefits from ultrasonography, and an aggressive search for fetal anomalies is recommended. Seventy-two percent of cases of early-onset preeclampsia in our institution were associated with significant fetal and placental malformations. An immunologic basis of the preeclampsia in these cases seems likely but remains unproven.