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Review Question - QID 214640

In scope icon M 1 A
QID 214640 (Type "214640" in App Search)
A medical student is reviewing the chest radiograph of a newborn during her pediatrics rotation as seen in Figure A. The patient had a low-grade fever this morning prompting a workup for infection. The medical student suggests treating the patient for a right upper lobe pneumonia; however, the attending states the structure here is a normal finding. Which of the following is the most likely embryologic origin of the structure shown?
  • A
  • A