Chorioangioma of the placenta: report of 2 cases with ultrasound study in 1.

Chorioangioma, a benign tumor of the placenta, is often associated with unfavorable effects on the mother as well as on the fetus. Two recently recorded cases of large chorioangiomas occurring in young mothers are reported. In 1 case, in which hydramnios was identified and the fetus was prematurely delivered, the diagnosis of placental tumor was made by ultrasound study.