Diagnostic imaging of intralobar bronchopulmonary sequestration.

as an area of nonfunctioning abnormal lung tissue which receives its blood supply from a systemic artery and characteristically has no connection with the tracheobronchial tree.2 About 70 percent of all the reported cases are of the intralobar variety.' The abnormal lung tissue in the intralobar type is located within the visceral pleura of a pulmonary lobe, whereas the extralobar form is like an accessory lobe because it has its own visceral pleura. The venous drainage of the extralobar type is usually into the systemic venous system, whereas the intralobar type drains into the pulmonary venous system.' All reported intralobar sequestrations are located above the diaphragm and are almost always in the lower lung