First-trimester diagnosis of recurrence of cystic hygroma using a vaginal ultrasound transducer.

The possibilities and limitations of first-trimester diagnosis of fetal structural defects using vaginal transducers are currently not well established. For couples at risk for cystic hygroma early transvaginal ultrasound examination at a gestational age of 10 weeks can be offered to rule out or confirm the presence of cystic hygroma, as described in this case report.