Kui M, Templeton P A, White C S, Cai Z L, Bai Y X, Cai Y Q
Department of Radiology, University of Maryland Medical System, Baltimore 21201, USA.
J Comput Assist Tomogr. 1996 Nov-Dec;20(6):983-6. doi: 10.1097/00004728-199611000-00021.
Our goal was to evaluate the presence and the significance of the air bronchogram sign in solitary pulmonary lesions (SPL) on CT.
One hundred thirty-two patients with SPL who underwent chest CT scans and had histological diagnosis were studied retrospectively. We reviewed all chest CT scans to assess for the presence of the air bronchogram sign in the SPL and recorded the distribution of this sign in malignant and benign lesions. The morphology of the aerated bronchi in the lesion and its significance in differential diagnosis were also evaluated.
Of 17 cases of benign lesions, only 1 (5.9%) had an air bronchogram; of 115 lung cancers, 33 (28.7%) had this sign (p < 0.05). The encased bronchi exhibited four morphologic patterns: normal, tortuous, ectatic, and cut-off. The morphology of the bronchus in the benign lesion was normal. However, bronchi in malignant lesions displayed all four types of morphology. The air bronchogram sign was seen in all histologic types of lung cancer (squamous cell 10, adenocarcinoma 9, bronchioloalveolar cell 12, small cell 1, non-small cell 1). Lesions of different sizes were noted to have air bronchograms, including those < 2 cm in diameter.
The CT air bronchogram sign in SPL is significantly more common in malignant than in benign lesions. The sign is seen in all lung cancer cell types and demonstrates varied bronchial morphology.
我们的目标是评估CT上孤立性肺结节（SPL）中空气支气管征的存在情况及其意义。
回顾性研究了132例接受胸部CT扫描并经组织学诊断的SPL患者。我们复查了所有胸部CT扫描，以评估SPL中空气支气管征的存在情况，并记录该征象在恶性和良性病变中的分布。还评估了病变内充气支气管的形态及其在鉴别诊断中的意义。
17例良性病变中，只有1例（5.9%）有空气支气管征；115例肺癌中，33例（28.7%）有此征象（p<0.05）。被包绕的支气管呈现四种形态模式：正常、扭曲、扩张和截断。良性病变中支气管形态正常。然而，恶性病变中的支气管呈现出所有四种形态类型。在所有组织学类型的肺癌中均可见空气支气管征（鳞状细胞癌10例、腺癌9例、细支气管肺泡细胞癌12例、小细胞癌1例、非小细胞癌1例）。不同大小的病变均可见空气支气管征，包括直径<2 cm的病变。
SPL的CT空气支气管征在恶性病变中比在良性病变中明显更常见。该征象在所有肺癌细胞类型中均可见，并表现出多样的支气管形态。
