3 Pulmonary sequestration

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Author: Dr. Ayush Goel


Pulmonary Sequestration = accessory lung (embryonic cut off of a segment from main lung)

 Types:
Intralobar
Extralobar

More common (75-85% cases)
Less common (15-25% cases)
 Presentation
Usually Child with recurrent infections
Usually Neonate with respiratory distress and cyanosis
Arterial supply
Aorta (Same in both types)
Venous supply
usually Pulmonary venous  drainage
Usually systemic venous drainage
Pleura
Same pleura as ipsilateral lung
Separate pleura from ipsilateral lung
Site
60% cases affect left lower lobe (Most commonly Posterior basal segment); 40% right lower lobe.
Always affect left lower lobe; can be subdiaphragmatic in 10% cases

Sequestrated lung appears hyperechoic than rest of lung on prenatal ultrasonography






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