Pulmonary sequestration

Pulmonary Sequestration

*Pulmonary sequestration: A non-functioning lung segment.
*Uncomplicated sequestration do not have PET-CT uptake

	Intra-lobar	Extra-lobar
1	Acquired	Congenital
2	Young adulthood	Usually present in <6mo span="">
3	Pain, repeated infection, cough, hemoptysis	Feeding difficulties, respiratory distress, cyanosis, cardiac failure due to shunting of blood
4	A/w recurrent pneumonia	A/w diaphragmatic hernia, other congenital abnormalities
5	~75% of pulm.sequestration	Rare
6	Enclosed in visceral pleura (normal)	Enclosed in its own pleura
7	Systemic venous drainage in 5% Drain into pulmonary vein	Systemic venous drainge in 80% Multiple, systemic feeding arteries
8	Supplied by systemic artery, usually single large artery	Supplied by multiple small aortic branches
9	May be in communication with bronchial tree if infected => air containing cystic mass +/- air-fluid level	More solid appearance
10	Majority: Left lower lobe > Right lower lobe