2 Pulmonary sequestration

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Author: Dr. Ayush Goel

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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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