牵拉性细支气管扩张3例。
当腺泡近端的呼吸性细支气管扩张，而远端的肺泡扩张不明显，腺泡中央型肺气肿就会发生。
Centrilobular emphysema occurs with loss of the respiratory bronchioles in the proximal portion of the acinus, with sparing of distal alveoli.
由于依附于细支气管壁面上的肺组织具有相当的“弹性”，因此，这些毛细管构成的组织壁面由肺组织向外拉伸，进而使毛细管扩张。
Due to the fact that the lung tissue that attaches itself to the walls of the bronchioles has a certain "elasticity", the walls are pulled outwards, thereby expanding the bronchioles.
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