Neonatal cervical lymphatic malformation involving the fetal airway the setting of emergency caesarean section

Lymphatic malformations are benign vascular anomalies comprised of lymphatic elements and most commonly occur in the neck. They may be diagnosed prenatally on ultrasound, and, in addition to confirming the diagnosis, fetal MRI can delineate the presence and extent of airway involvement. A variety of therapies are available for the treatment of lymphatic malformations including medical management, sclerotherapy, and surgery.We report a case of a 28 year-old pregnant female diagnosed with a fetal neck mass by ultrasound at 21 weeks gestation. A fetal MRI was performed which demonstrated a multiseptated cystic neck mass most suggestive of a lymphatic malformation. The mass was noted to be intimately associated with the fetal airway. Follow up ultrasounds showed continued growth of the lesion throughout pregnancy. The baby was born by EXIT procedure and the lymphatic malformation was ultimately treated by a combination of medical treatment, sclerotherapy, and surgery.Cervical lymphatic malformations have a classic imaging appearance and can enlarge throughout gestation as well as after delivery. The treatment plan typically involves a multidisciplinary approach.