Department of Radiology, Niigata City General Hospital, 463-7 Chuo-ku, Shumoku, Niigata City, Niigata-ken 950-1197, Japan.
Eur Radiol. 2010 Jan;20(1):95-9. doi: 10.1007/s00330-009-1526-z. Epub 2009 Aug 6.
The aim of this study was to evaluate the characteristics and CT features of subcarinal air collections on thin-section multidetector-row computed tomography (MDCT). Two hundred asymptomatic adult subjects without a history of pulmonary disease underwent MDCT. The CT appearances and characteristics of foci of extraluminal air contiguous to the main bronchus in the subcarinal region were retrospectively analysed. Subcarinal air collections were found in 81 of 200 subjects (41%) and were spotty or microtubular in 67 of 81 subjects and rounded or oval in the other 14. Each subcarinal air focus communicated, or seemed to communicate, with the adjacent bronchus in 76 of 81 cases. Our data demonstrate that extraluminal air foci in the subcarinal region are common CT findings and routinely depicted on thin-section MDCT, and that most of these lesions seem to be main bronchial diverticula. Cystic air foci in the subcarinal region should be called subcarinal air cysts. The precise recognition of these cysts improves the ability to avoid misidentification, such as pneumomediastinum.
本研究旨在评估亚隆突区空气积聚的特征和 CT 表现。200 例无症状成年受试者，无肺部疾病史，行 MDCT 检查。回顾性分析亚隆突区主支气管旁管外空气灶的 CT 表现和特征。81 例（41%）受试者存在亚隆突空气积聚，其中 67 例呈点状或微管状，14 例呈圆形或椭圆形。81 例中，76 例每个亚隆突空气灶与相邻支气管相通或似相通。我们的数据表明，亚隆突区管外空气灶是常见的 CT 表现，在薄层 MDCT 上常规显示，这些病变大多为主支气管憩室。亚隆突区囊性空气灶应称为亚隆突空气囊肿。准确识别这些囊肿可提高避免误识别的能力，如纵隔气肿。
