A term baby boy is assessed for respiratory distress in the neonatal intensive care unit. At 1 and 5 minutes, Apgar values are 2 and 5, respectively. Respirations are 84/min. The patient has a barrel chest, a scaphoid abdomen, and slight cyanosis of his limbs on examination. Auscultation reveals that the left lung has no breath sounds; the right lung has normal aeration. A chest x-ray shows several fluid-filled cystic regions on the left, as well as a mediastinal shift to the right. Which of the following embryologic events did not occur in this patient?

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Quizplus · Accepted Answer

Eductional Objective: The inability of the pleuroperitoneal folds to seal causes congenital diaphragmatic hernia. Newborns experience respiratory distress, unilateral reduced breath sounds, and a scaphoid abdomen immediately after birth, with imaging demonstrating thoracic bowel loops and mediastinal shift.

A Term Baby Boy Is Assessed for Respiratory Distress in the Neonatal