Abstract
Summary (1) Broncho-pulmonary abnormalities are being recognised with increasing frequency during life and have some clinical importance. (2) A provisional classification of congenital defects of the lungs is outlined. (3) The most common abnormalities are those of lobation; they may be due to additional or deficient fissures or to displaced structures such as the azygos vein. (4) Abnormalities of the bronchi include supernumerary branches which may be distinguished from the more common displaced normal branches. (5) Abnormalities of the parenchyma comprise true accessory lungs and varying degrees of agenesis and hypoplasia. (6) Examples illustrating some of the more important abnormalities of the lung are described.
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