Trigaux J P, Jamart J, Van Beers B, Goncette L, Pringot J
Department of Radiology, Cliniques ucl Mont-Godinne, Yvoir, Belgium.
Acta Radiol. 1995 May;36(3):265-9.
The purpose of this study was to determine the prevalence of enlargement of the azygos system in the case of lung sequestration and its potential usefulness in the differential diagnosis of lower lobe opacities. Seven consecutive adult cases of pulmonary sequestrations were retrospectively enrolled; 4 sequestrations were proved surgically and all 7 angiographically. A group of 50 consecutive patients with a normal chest CT were used as controls. Another group consisted of 25 consecutive patients identified on the basis of an opacity in a posterobasal location on chest CT. For the 3 groups, the maximum diameter of the azygos and hemiazygos veins was measured, the level of measurement located between the upper poles of the kidneys and the confluence of inferior pulmonary veins into the left atrium. The diameter of the azygos veins (mean 10.4 +/- 5.1 mm) and of the hemiazygos veins (mean 7.1 +/- 3.0 mm) in the sequestration group was significantly larger than the diameter of the azygos and hemiazygos veins in the control group (mean 5.7 +/- 2.5 mm, and 3.4 +/- 2.4 mm, respectively), as well as in the study group (mean 5.9 +/- 2.6 mm and 3.3 +/- 2.6 mm, respectively). Our results suggest that enlargement of the azygos system in association with a posterobasal chest opacity, although nonspecific, may be a useful additional CT sign of sequestration.
本研究的目的是确定肺隔离症患者奇静脉系统增粗的发生率及其在鉴别诊断下叶肺实变中的潜在作用。回顾性纳入了7例连续的成年肺隔离症患者；4例经手术证实，7例均经血管造影证实。选取50例胸部CT正常的连续患者作为对照组。另一组由25例胸部CT显示后基底段有肺实变的连续患者组成。对这3组患者，测量奇静脉和半奇静脉的最大直径，测量水平位于双肾上级与下肺静脉汇入左心房处之间。肺隔离症组奇静脉（平均10.4±5.1mm）和半奇静脉（平均7.1±3.0mm）的直径显著大于对照组奇静脉和半奇静脉的直径（分别为平均5.7±2.5mm和3.4±2.4mm），也大于研究组奇静脉和半奇静脉的直径（分别为平均5.9±2.6mm和3.3±2.6mm）。我们的结果表明，奇静脉系统增粗伴后基底段胸部实变，虽然不具有特异性，但可能是肺隔离症一个有用的CT附加征象。
