Fetal cystic lymphangioma (cystic hygroma): prepartum ultrasonic findings.

The abnormal prepartum ultrasonic scan in a case of fetal cystic lymphangioma is presented. A large intrauterine cystic mass adjacent to a 23-week-old fetus was identified by ultrasound. After delivery, this was proved to be a cystic lymphangioma extending from the fetal neck and supraclavicular region.