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.  

From Sumer's Radiology Site http://www.sumerdoc.blogspot.com -The Top Radiology Magazine. Teleradiology Providers at www.teleradproviders.com Mail us at [e-mail]

Source: Sumer's Radiology Site - June 11, 2013 Category: Radiologists Authors: Sumer Sethi Source Type: blogs