Figure 3f. Bilateral pulmonary sequestration that caused congestive heart failure in a male neonate. The patient’s condition was diagnosed prenatally at US. (a) Combined SSD and multiplanar reformatted image shows an anomalous artery that arises from the descending thoracic aorta and bifurcates to supply two enhancing soft-tissue masses in the lung bases. (b, c) Curvilinear multiplanar reformatted images clearly delineate the anomalous arteries in the right (b) and left (c) lung bases. (d) Findings on an aortogram obtained before successful embolization of the aberrant arteries are virtually identical to and thereby help confirm the CT angiographic findings (cf a). (e) Axial minimum-intensity-projection reformatted image reveals an accessory aerated aberrant bronchial tree (arrow) that connects the two masses. The aberrant bronchial tree is separated from the normal tracheobronchial tree, a finding that suggests a rare connection to the esophagus or stomach. AO = aorta. (f) On a follow-up CT angiogram obtained 1 year after embolization, the volume of the left sequestration is significantly reduced and the right sequestration has almost totally disappeared. Note the steel coils (arrows) used for embolization of the right aberrant artery.