气管旁含气囊肿发病率及与肺气肿关系的CT探讨

The CT study on the incidence of paratracheal air cysts and its relationship with emphysema

目的为了确定气管旁含气囊肿(PTAC)在胸部CT上的发病率,形态学特征及与肺气肿的关系.方法回顾4个月中连续的1058例患者的胸部CT图像,对PTAC的发病率、大小、形态以及肺气肿的关系进行回顾性分析.结果在1058例患者中,有72例(6.8%) PTAC.647例男性有41例(6.6%)PTAC,411例女性患者中有29例(7.1%)PTAC.PTAC的最高发病率发生于51~60岁.48例(69.6%) PTAC最大径为3~15mm,35例(48.6%)在冠状位图像径线最大.9例(12.9%)患有肺气肿.大部分(95%)PTAC位于C7至T2椎体水平.肺气肿的性别差异显著(P<0.01),PTAC和肺气肿的发生差异无统计学意义(P>0.05).结论此研究PTAC的发病率远高于以前的研究.女性比男性发病率略高,最常见于51~60岁,PTAC大小3~15mm,并且上下经线大.PTAC与肺气肿的关系小.

Objective To determine the incidence,morphological characteristics and relevance of paratracheal air cysts(PTACs)with pulmonary emphysema,as seen on thoracic CT. Methods The chest CT images of 1058 consecutive patients in our hospital during 4 months were reviewed. The incidence,size,shape of PAC and the relationship between emphysema and PAC were analyzed retrospectively. Results Among the 1058 patients,72(6.8%)had PTACs.41(6.6%)of the 647 male patients and 29(7.1%)of the 411 female patients had PTACs. The highest prevalence of PTACs(21 patients,9.5%)was found in those who were in the sixth decade of life. 48(69.6%)PTACs measured 3-18.5mm at the longest diameter and 35(48.6%)were elongated on the coronal section images. 9(12.9%)patients with PTACs had pulmonary emphysema. The majority(95%)of paratracheal air cysts were at the level of the seventh cervical to the second thoracic vertebrae. Emphysema differed significantly between genders(P<0.01). The relationship between the presence of PTACs and the presence of emphysema were not statistically significant(P>0.05). Conclusion The incidence of PACs is estimated to be much higher than that of previous studies. The incidence of PTAC is slightly higher in females than in males. It is most common in 51 to 60 years old. The sizes of PTACs are 3 to 15 mm, and the upper and lower meridians are larger. PTAC has little relationship with emphysema.