STARD-compliant article: Comparison of pulmonary sequestrations with thoracic and abdominal aortic arterial supply.

Pulmonary sequestrations (PS) are typically supplied by a vessel originating from thoracic aorta, or abdominal aorta. Differences in imaging features between these PS subtypes have not been described.To analyze the imaging features of PS with arterial supply from the thoracic and abdominal aorta.Retrospectively, 23 pathologically proven cases of pulmonary sequestration were analyzed and compared based on the site of feeding artery origin.In 21 cases (21/23), the PS was soft tissue density. 1 (1/23) PS was purely cystic and another heterogeneous with both cystic and solid components (1/23). In 16/23 cases, the feeding vessel(s) arose from the thoracic aorta (male:female ratio 1:7) and in 7/23 cases from the abdominal aorta (male:female ratio 4:3). Feeding vessels from the thoracic aorta were duplicated in 7/16 cases. PS location (P <.05) and size (P <.001) differed based on the origin of the feeding vessel (thoracic aorta: 14/16 left lower lobe, mean volume 962.97 mL; abdominal aorta: 3/7 left lower lobe, mean volume 1120.89 mL). The feeding arteries themselves differed in size depending on their site of origin (thoracic aorta: mean diameter 7.0mm ± 2.7 mm, mean length 44.6mm ± 10.9 mm; abdominal aorta: mean diameter 3.3mm ± 0.6 mm, mean length 103.6mm ± 34.5 mm).PS size and distribution differ depending upon the site of feeding vessel origin as does the size of the feeding vessel itself.