<unk>  <unk>  is a<unk>  disorder similar to bronchopulmonary sequestration. In<unk> , usually an entire lobe of lung is replaced by a non-working<unk>  piece of abnormal lung tissue. This abnormal tissue will never function as normal lung tissue.
In most cases the outcome of a fetus with<unk>  is very good. However in a rare few cases the<unk>  mass grows so large as to limit the growth of the surrounding lung and cause pressure against the heart. In these situations, the<unk>  can be life-threatening for the fetus.
Congenital cystic adenomatoid malformation
Adenomatoid tumor
Bronchogenic cyst
Pulmonary cystic lymphangiectasis
Sarcomatoid carcinoma of the lung
Pulmonary capillary hemangiomatosis
Solitary mastocytoma
Hilus cell tumor