title: Comparison of anomalous systemic artery to left lower lobe and pulmonary sequestration in left lower lobe by computed tomography.
abstract: BACKGROUND
  Differentiation 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.
  
  
  OBJECTIVE
  To compare computed tomography (CT) findings of ASALLL and PS in the left lower lobe (LLL).
  
  
  METHODS
  This study included 16 patients with ASALLL and 25 patients with PS in LLL confirmed by operative and pathologic findings.
  
  
  RESULTS
  Cough 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 the anomalous artery (11.88 ± 1.13 mm) in ASALLL was significantly larger than that (5.96 ± 0.98 mm) in PS (P < 0.01). The presence of anomalous artery arising from thoracic aorta was not different between ASALLL (100%) and PS (72%).
  
  
  CONCLUSIONS
  Radiographic indications of ASALLL differ from those of PS in the LLL. Indications that may suggest ASALLL include an enlarged anomalous systemic artery arising from the thoracic aorta, dilated left inferior pulmonary veins, absence of the interlobar artery distal to the origin of the superior segmental artery, normal bronchial distribution, and GGO in the LLL.
authors.affiliation: Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China jason020@163.com.
authors.forename: Jie
authors.initials: J
authors.lastname: Qin
authors.affiliation: Department of Ultrasound, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Xiao-li
authors.initials: XL
authors.lastname: Wang
authors.affiliation: Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Ming-jun
authors.initials: MJ
authors.lastname: Bai
authors.affiliation: Division of Cardiothoracic Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Shao-hong
authors.initials: SH
authors.lastname: Huang
authors.affiliation: Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Xiu-zhen
authors.initials: XZ
authors.lastname: Chen
authors.affiliation: Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Shan
mesh_terms: D000328:Adult; D001998:Bronchopulmonary Sequestration / Q000000981:diagnostic imaging* / Q000601:surgery; D003287:Contrast Media; D005260:Female; D006801:Humans; D007472:Iohexol / Q000031:analogs & derivatives; D008297:Male; D011013:Pneumonectomy; D011651:Pulmonary Artery / Q000002:abnormalities*; D011667:Pulmonary Veins / Q000002:abnormalities; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media; D007472:Iohexol; C038192:iopromide
keywords: Anomalous systemic artery; X-ray; computed tomography (CT); sequestration