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胸廓入口区气管旁含气囊肿的CT及临床表现

见肺纹理并与胸腔内肺组织相连[13],而本病虽在呼吸周期中其大小可稍有改变,但很少有完全消失不见者,并且距肺尖较肺尖疝及肺尖部间隔旁肺大疱为远,也很少有能压迫气管变形者。喉、咽囊肿可根据位置较本病高,胃镜、食管钡餐、纤维气管镜可见到与喉、咽的交通而得到诊断[14]。位于气管后方的本病和食管囊肿的鉴别较困难,有时囊肿内出现的气液平面可提示为食管囊肿,确诊还需依靠食管造影[15]。

  综上所述,胸廓入口区气管旁右后外侧含气囊肿(部分囊肿可见与气管相连通)是气管憩室的典型征象,同时,在CT平扫上,气管憩室认为是临床上COPD和影像上肺气肿的可靠表现。并且在CT上气管囊肿和气管憩室的鉴别是十分困难的。气管憩室多发生在气管后壁,确诊还需依靠气管造影。

【参考文献】
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  [8]吴国庚,潘纪戍,刘甫庚,等. 气管旁囊肿的CT表现[J]. 临床放射学杂志, 2003,22(8):670673.

  [9]WONDONG K, SEAN H L, HARVEY O C, et al. The association between small airway obstruction and emphysema phenotypes in COPD[J]. Chest, 2007,131:13721378.

  [10]REGINALD G. “SaberSheath” trachea: relation to chronic obstructive pulmonary disease[J]. Am J Roentgenol, 1978,130:441445.

  [11]OBUCHOWSKI A M, ORTIZ A O. MR imaging of the thoracic inlet[J]. Magn Reson Imaging Clin N Am, 2000,175:417.

  [12]张勇,杨绍容,程德云,等. 先天性支气管囊肿的临床及病理分析[J]. 中华结核和呼吸杂志, 2003,26(10):619622.

  [13]H.PAGE M, DANIEL S G, CHA

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