The following diagram depicts the various parts from which the diaphragm develops. Defects in which part most commonly lead to congenital diaphragmatic hernia?
Ans: D. D
(Ref Gray’s 40/e p1015; Langman’ll/ep161)
- Congenital diaphragmatic hernia is most frequently caused by failure of one or both of the pleuroperitoneal membranes (D) to close the pericardioperitoneal canals.
- As a result, abdominal contents herniate through the resultant defect in the posterolateral diaphragm & compress the ipsilateral developing lung.
- Posterolateral location of this hernia is known as Bochdalek hernia and is distinguished from the congenital hernia of the anteromedial, retrosternal diaphragm, which is known as Morgagni hernia.