[A new case of hydatidiform mole occurring on one of the ova of a twin pregnancy].

The authors report here a new case of hydatid mole in one of the eggs of a mole pregnancy. 48 other cases have been reported in 13 publications. The birth of a viable, well-developed fetus is described in 13 instances (27%), fetal death in utero in 22 instances (46%), birth of a non-viable fetus 11 times (23%) and malignant degeneration twice (4%). Medical interruption of the pregnancy is indicated for the slightest sign of fetal anomaly or maternal complication. Prostaglandins may be used for that purpose. However, it is possible to let such a pregnancy follow its course.