Ex Utero Intrapartum Treatment for Prenatally Diagnosed Cervicofacial Lymphatic Malformations

Introduction: Cervicofacial lymphatic malformations (cf-LM) may be identified on prenatal ultrasound, prompting consideration of ex utero intrapartum treatment (EXIT) to secure the fetal airway. Furthermore, the recent shift in postnatal management of cf-LM from resection alone toward a multimodal approach including sirolimus and sclerotherapy may impact the neonatal outcomes of cf-LM. This study aims to characterize the neonatal outcomes of patients with prenatally diagnosed cf-LM who underwent EXIT-to-airway.

Methods: Retrospective, single-center review of all patients who underwent EXIT-to-airway for cf-LM (2011-2020) was performed. Demographics, prenatal imaging, intraoperative details, and outcomes were analyzed using descriptive statistics (median [interquartile range]).

Results: Six patients with prenatally diagnosed cf-LM underwent EXIT-to-airway at a median gestational age of 36 (33.8-36.9) wk. The median volume on fetal magnetic resonance imaging was 187.5 mL (142.3-237.8) and median tracheoesophageal displacement index was 11 mL (9.25-15). All were successfully intubated on placental support with a median duration of 25 (15.25-91) d. There was one fatality at day of life 10 due to necrotizing enterocolitis totalis. Among survivors, 2 of 5 underwent tracheostomy placement, 4 of 5 underwent gastrostomy tubes placement, and all 5 received sirolimus at day of life of 9 [8-10] d. Four patients underwent debulking or excision of their cf-LM during the initial hospitalization. Patients had a median length of stay of 68 (45-129) d. One patient experi enced a pneumothorax with evidence of barotrauma following EXIT-to-airway requiring chest tube placement (duration 8 d).

Conclusions: EXIT-to-airway procedure remains a feasible strategy for mitigating neonatal hypoxia in cases of prenatally diagnosed cervicofacial lymphatic malformations. However, postnatal outcomes are variable with potential long-term aerodigestive sequelae.