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MBBS QUESTION #10189
Question 1
A neonate presents with respiratory distress and a scaphoid abdomen; imaging shows abdominal viscera within the thoracic cavity. This congenital diaphragmatic hernia most commonly occurs through which defect?
  • Foramen of Bochdalek (posterolateral defect)✔️
  • Foramen of Morgagni (anterior defect)
  • The esophageal hiatus
  • A defect in the central tendon
Correct Answer Explanation
The foramen of Bochdalek, a posterolateral defect resulting from failure of the pleuroperitoneal membrane to fuse properly (more often on the left), accounts for the vast majority of congenital diaphragmatic hernias, allowing abdominal viscera to herniate into the thorax and compress the developing lung.