Fetal diaphragmatic hernia without visceral herniation

Area of Science:

• Pediatric Surgery
• Neonatal Medicine
• Medical Imaging

Background:

• Congenital diaphragmatic hernia (CDH) is a serious condition often diagnosed prenatally.
• The severity of CDH can vary, impacting patient prognosis.
• Prenatal diagnosis aims to identify CDH early for management.

Purpose of the Study:

• To investigate the hypothesis that CDH cases without in utero visceral herniation have a better prognosis.
• To compare outcomes of neonates with CDH diagnosed postnatally versus prenatally.
• To identify predictors of good prognosis in congenital diaphragmatic hernia.

Main Methods:

• Retrospective review of 41 neonates with left-sided CDH treated between 1990 and 1993.
• Independent review of prenatal sonographic imaging (≥20 weeks gestation) for 10 postnatally diagnosed cases.
• Comparison of outcomes between 9 infants with undetectable prenatal CDH and 18 controls with prenatal diagnosis.

Main Results:

• Nine of 10 infants with initially undetectable prenatal CDH survived.
• Only one of these nine required prosthetic repair and one required extracorporeal membrane oxygenation (ECMO).
• Control group (prenatally diagnosed CDH) had higher mortality (22%), prosthetic repair rates (72%), and ECMO use (50%).

Conclusions:

• A subgroup of congenital diaphragmatic hernia patients, particularly those with isolated left-sided defects undetectable by mid-pregnancy ultrasound, exhibit a favorable prognosis.
• Detailed prenatal sonography in the second half of pregnancy can help predict better outcomes for neonates with CDH.
• The findings suggest a spectrum of CDH severity influenced by prenatal detection and herniation status.