-- RadioGraphics 1997; 17: 725-745

Figure Legend | Panel A | Panel B | Panel C

Figure 4: Diagrams depict proposed sequence of events in the development of acquired intralobar sequestration. A = aorta, arrow = pulmonary ligament artery, PA = pulmonary artery. Panel A An endobronchial obstructionresults in postobstructive pneumonia in a lower lobe. Panel B With progressive inflammation, the pulmonary arterysupplying the affected portion of the lung becomes obstructed. Panel C The small arteries normally located in the pulmonary ligament progressively hypertrophy to provide systemic blood supply to the chronically inflamed lung parenchyma, resulting in the formation of an intralobar sequestration.

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