空气支气管征在CT诊断外周型肺弧立结节中的价值

目的评价空气支气管征鉴别诊断外周型肺孤立结节(直径≤3em)的价值。方法作者回顾分析了经手术或/和纤支镜或/和肺穿刺活检病理证实的190例外周型肺结节的空气支气管征的薄层CT影像。结果100例肺癌CT显示空气支气管征52例(52％)，其中腺癌71.9％(22/31)、鳞癌34.1％(14/41)、腺鳞癌4/5、小细胞癌7/14、低分化癌5/9。50例炎性假瘤CT显示空气支气管征29例(58％)。32例结核球、5例错构瘤及3例肺囊肿均无肺空气支气管征。结论空气支气管征可见于多种结节性肺病变，它似乎不是外周型小肺癌尤其腺癌的特征。也不能帮助鉴别良恶性肺结节。

The Value of the Air Bronchogram in CT Diagnosis of Peripheral Solitary Pulmonary Nodule

Objective To evaluate the air bronchograpm in the differential diagnosis of peripheral solitary pulmonary nodule(3 cm or less) by computed tomography(CT). Methods The thin section CT images of air bronchogram in 190 cases with peripheral solitary pulmonary nodule confirmed by surgical resection and/or bronchoscopy and/or peroutaneous needle biopsy and histopathology were analysed. Results The air bronchogram was seen in 52/100(52%) cases with peripheral lung cancers and in 29/50 cases (58%) with inflammatory pseudotumors on CT scans. Of lung cancers, there were adenocarcinoma in 23/31 cases, squamous cell carcinoma in 14/41 cases, adenosquamous carcinom in 4/5 cases,small cell carcinoma in 7/14 cases and poorly differentiate carcinoma in 5/9 cases. The air bronchograms were not seen in 32 tubereulomas,5 hamartomas and 3 pulmonary cysts. Conclusion Air bronchogram can be seen in several pulmonary nodules, it does not appear to be the characteristic of small peripheral carcinoma especially adenocarcinoma. and it alse can not be helpful in distingushing malignant and benign pulmonary nodules.