Congenital cystic adenomatoid malformation of the lung.

The clinical and pathologic-anatomical picture of this rare lung malformation is described with reference to three cases from three different paediatric surgical hospitals. Methods of differential diagnosis against lung sequestration, pulmonary cysts, lobar emphysema, diaphragmatic hernia and pneumothorax are indicated. A definitive diagnosis and classification can be made only by means of histomorphological examinations.