摘要
目的：分析气管旁气囊肿（Paratracheal air cyst，PTAC）在64排螺旋CT上的发生率及其形态特征，提高对其的认识水平。方法：选择2013年1—6月在我院行64排胸部螺旋CT平扫的患者5 005例，回顾性分析是否有PTAC及其形态特征。结果：432例显示有PTAC，总的发生率为8.63%。其中男性发生率为8.76%（245/2 797），女性发生率为8.47%（187/2 208），男女发生率无明显统计学差异（χ2=0.132，P=0.717）。404例（93.52%）为单个气囊肿，23例（5.32%）有2个气囊肿，5例（1.16%）有3个气囊肿，共465个气囊肿。所有气囊肿均紧邻气管，与气管间距均在3 mm以内。气囊肿大小为1 mm×1 mm~37 mm×49 mm，平均长径（5.6±5.2） mm，平均短径（3.6±3.6） mm。与气管相通者253个（54.41%），内部有分隔者164个（35.27%）。气囊肿中心位于C7~T4椎体水平，其中86.67%位于T1~T2椎体水平。96.35%的气囊肿中心毗邻气管6~8点的位置。有气囊肿者的右上胸膜增厚及右上肺纤维灶出现率较无气囊肿者出现率稍高（42.36%、44.44% vs 38.12%、40.04%），但无明显统计学差异。结论：PTAC相当常见，单发为主，大部分位于T1~T2椎体水平并紧邻气管的6~8点位置，半数以上可见细小孔道与气管相连通，部分气囊肿内可见分隔，与局部胸膜增厚、肺内纤维灶关系不大。
Abstract
Objective: To evaluate the incidence and morphological characteristics of paratracheal air cyst(PTAC) with 64-row spiral CT, and to improve the recognition ability of PTAC. Methods: Five thousand and five patients underwent thoracic plain CT scan with 64-row spiral CT during a half-year at our institution were retrospectively enrolled to analyze for the presence of PTAC and their morphological characteristics. Results: Four hundred and thirty two patients had PTACs, and the general incidence was 8.63%. The incidence of male was 8.76%(245/2 797), and the incidence of female was 8.47%(187/2 208). There was no significant difference between the male and female(χ2=0.132, P=0.717). Among 432 patients, 404 patients(93.52%) had one air cyst, 23 patients(5.32%) had 2 air cysts, 5 patients(1.16%) had 3 air cysts, with the total of 465 air cysts. All air cysts were immediately adjacent to trachea within 3 mm. The air cysts ranged in size from 1 mm×1 mm to 37 mm×49 mm with mean long axis diameter of (5.6±5.2) mm and short axis diameter of (3.6±3.6) mm. Two hundred and fifty-three air cysts(54.41%) showed direct communication to trachea, and 164 air cysts(35.27%) had septations inside. All air cysts were located at C7~T4 vertebral level including 86.67% of them at T1~T2 vertebral level, meanwhile 96.35% of air cysts were next to the 6~8 o’clock position of trachea. The prevalence of right superior pleural thickening and fibers at right upper lung in patients with air cyst were slightly higher than that in patients without air cyst(42.36%, 44.44% vs 38.12%, 40.04%), but there was no significant statistical difference between them. Conclusion: The incidence of PTAC was quite high. Most of PTACs were single, immediately adjacent to the 6~8 o’clock position of trachea, and located at T1~T2 vertebral level. More than half of PTACs had thin communication to trachea and part of PTACs had septations inside. PTACs have no significant relation with local pleural thickening and fibers at right upper lung.
关键词
纵膈囊肿 /
体层摄影术 /
螺旋计算机
Key words
Mediastinal cyst /
Tomography /
spiral computed
方 春;王立章;孙延豹;王延春.
气管旁气囊肿发生率及其形态特征：64排螺旋CT大样本研究[J]. 中国临床医学影像杂志. 2015, 26(8): 570-573
FANG Chun;WANG Li-zhang;SUN Yan-bao;WANG Yan-chun.
Incidence and morphological characteristics of paratracheal air cyst: a large sample study with 64-row spiral CT[J]. Journal of China Clinic Medical Imaging. 2015, 26(8): 570-573
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