FLASH CARD: Pulmonary Sequestration
- Extralobar sequestrations have systemic arterial supply (usually from the aorta) as well as systemic drainage (usually into the IVC, azygous, hemiazygous, or the portal vein), thus creating a L to R shunt (functionally it is an AVF). 90% are related to the left hemidiaphragm. It possesses its own pleural investment and 30% are associated with diaphragmatic hernias. They may also communicate with the GI tract. They are congenital
- Intralobar sequestrations occur most commonly in the lower lobes (usually the left) and are infrequently associated with other anomalies. Their arterial supply is via systemic circulation (usually the aorta or a branch) but their drainage is via the pulmonary veins, creating a L to L shunt.
FLASH CARD: Pulmonary Sequestration Reviewed by Sumer Sethi on Tuesday, June 11, 2013 Rating: