Imaging characteristics of intra- and extra-lobar sequestration [124]

Type Intra-lobar Extra-lobar
Percentage 75% of cases 25% of cases
Presentation Presents in adulthood with pain, infection and haemoptysis
40-50% are associated with congenital anomalies 
Presents in infancy with feeding difficulties, respiratory distress, cyanosis and heart failure
Venous drainage Central drainage (‘intra’ = ‘central’ drainage) Systemic drainage via inferior vena cava, azygos or hemiazygos
Arterial supply Systemic feeding vessels from the descending thoracic aorta Systemic feeding from aorta or from the splenic, gastric or intercostal arteries
Pleural relationship Enclosed in visceral pleura Own pleura



 

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