ASYNCHRONOUS PULMONARY HYPERPLASIA ASSOCIATED WITH TRACHEAL ATRESIA -PATHOLOGICAL AND PRENATAL SONOGRAPHIC FINDINGS

We describe a case of pulmonary hyperplasia associated with tracheal a tresia and a complete obstruction to the egress of pulmonary secretion s. In classical pulmonary hyperplasia associated with cartilagenous la ryngeal atresia and a persistent pharyngotracheal duct, the histologic appearance of the lungs is normal but exhibits ''synchronous'' hyperm aturity. The histologic patten in our case is much less mature, resemb les CAM type III, and exhibits ''asynchronous'' development. We sugges t that these histologic patterns be distinguished and that pulmonary h yperplasia is probably underrecognized and not nearly as rare as previ ously thought.