Fetoscopic Endoluminal Tracheal Occlusion in Fetuses with Severe Diaphragmatic Hernia: A Three-Year Single-Center Experience.

Objective: To report on our experience in the prenatal treatment of severe congenital diaphragmatic hernia (CDH) by fetoscopic endoluminal tracheal occlusion (FETO). Methods: Between 2012 and 2014, FETO was performed at our center in 21 cases of CDH considered to be severe based on sonographic measurement of observed/expected lung-to-head ratio (O/E LHR) and side of the defect. We reported pre- and postoperative ultrasound findings, procedure-related complications, pregnancy outcome and survival at 1-3 years of age. Results: The median gestational age (GA) at balloon insertion was 28.1 weeks (range 26.0-31.1) and the median GA at delivery 34.7 weeks (range 31.6-39.0); delivery before 32 and 34 weeks occurred in 2 (9.5%) and 7 (33.3%) cases, respectively. Postnatal survival at 1-3 years of age in the 17 cases with isolated unilateral CDH was 47.1%. The percentage difference between pre-balloon removal O/E LHR and pre-FETO O/E LHR was significantly higher in survivors compared to neonates who died (40.8 vs. 21.2%, respectively; p Conclusions: In this study, FETO was associated with an infant survival of 47% in cases with isolated unilateral severe CDH. The post-FETO increase in O/E LHR was higher in fetuses that survived compared to those who died.