In the past 11 years, we have identified 5 cases of pulmonary sequestration in National Cheng Kung University Hospital.

• 解剖上它可分为（1）肺叶内型：游离肺存在正常的肺叶之内（2）肺叶外型：游离肺在正常的肺叶之外，并有其个别的肋膜包覆。