Comparison of anomalous systemic artery to left lower lobe and pulmonary sequestration in left lower lobe by computed tomography.

BackgroundDifferentiation of anomalous systemic artery to the left lower lobe (ASALLL) from pulmonary sequestration (PS) is essential, as ASALLL can be corrected by anastomosis, embolization, or ligation of the anomalous artery.PurposeTo compare computed tomography (CT) findings of ASALLL and PS in the left lower lobe (LLL).Materials and methodsThis study included 16 patients with ASALLL and 25 patients with PS in LLL confirmed by operative and pathologic findings.ResultsCough and sputum were more common in PS (84% and 60%, respectively) than in ASALLL (25% and 12.5%, respectively) (P < 0.05). Hemoptysis was more common in ASALLL (100%) than in PS (24%) (P < 0.05). The frequency of ground glass opacity (GGO), normal bronchial distribution, dilated left inferior pulmonary veins, and absence of the interlobar artery distal to the origin of the superior segmental artery in LLL differed significantly between ASALLL and PS. Mass was less common in ASALLL (0%) than in PS (88%) (P < 0.01). The mean diameter of t...