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Updated: May 11, 2026

Transuterine Fetal Tracheal Occlusion Model in Mice
Published on: February 5, 2021
Current concepts on the pathogenesis and etiology of congenital diaphragmatic hernia
1Centre for Neuroscience, Department of Physiology, Women and Children's Health Research Institute, 3-020M Katz Building, University of Alberta, Edmonton, AB T6G 2E1, Canada.
Insights
Congenital diaphragmatic hernia (CDH) research reveals insights into its developmental causes. Understanding the embryology of diaphragmatic defects and signaling pathways is key to improving outcomes for affected newborns.
Area of Science:
- Developmental biology
- Neonatal medicine
- Medical genetics
Background:
- Congenital diaphragmatic hernia (CDH) is a birth defect characterized by incomplete diaphragm formation, often a Bochdalek hernia.
- Abdominal organs herniating into the chest cavity impede fetal lung development, causing pulmonary hypoplasia and hypertension in newborns.
- Despite advanced neonatal care, CDH presents significant mortality and morbidity challenges.
Purpose of the Study:
- To review current research on the pathogenesis and etiology of congenital diaphragmatic hernia.
- To elucidate the embryological origins of diaphragmatic defects in CDH.
- To identify abnormalities in signaling cascades relevant to CDH development.
Main Methods:
- Review of systematic studies utilizing animal models (rats, transgenic mice).
- Analysis of human tissue samples.
- Investigation of embryological development and signaling pathways.
Main Results:
- Research is advancing the understanding of CDH pathogenesis and etiology.
- Insights are being gained into the embryological origins of diaphragmatic defects.
- Abnormalities in developmentally regulated signaling cascades are being identified.
Conclusions:
- Continued research using integrated models provides crucial insights into CDH.
- Understanding the molecular and developmental basis of CDH is essential for therapeutic advancements.
- Further investigation into signaling pathways may lead to improved treatments for CDH.
Abstract:
This review outlines research that has advanced our understanding of the pathogenesis and etiology of congenital diaphragmatic hernia (CDH). The majority of CDH cases involve incomplete formation of the posterolateral portion of the diaphragm, clinically referred to as a Bochdalek hernia. The hole in the diaphragm allows the abdominal viscera to invade the thoracic cavity, thereby impeding normal lung development. As a result, newborns with CDH suffer from a combination of severe pulmonary hypoplasia and pulmonary hypertension. Despite advances in neonatal intensive care, mortality and serious morbidity remain high. Systematic studies using rat and transgenic mouse models in conjunction with analyses of human tissue are providing insights into the embryological origins of the diaphragmatic defect associated with CDH and abnormalities of developmentally regulated signaling cascades.
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