We present transvaginal ultrasonographic findings of a fetus with Dandy-Walker malformation
and associated massive obstructive hydrocephalus at 13 weeks' gestation. First-trimester
ultrasonographic diagnosis of Dandy- Walker malformation is uncommon with only two
such occurrences having been reported previously. These cases and recent reports of
single gene transmission of this condition in some families emphasize the importance
of first-trimester transvaginal ultrasound assessment especially in women with previously
affected fetuses.
Transvaginal ultrasound - prenatal diagnosis - first-trimester - Dandy-Walker malformation
- posterior fossa