Congenital Cystic Lung Lesions: An Update on Clinical and Pathologic Correlates.

"Cystic" lung lesions that arise in utero or early postnatal life encompass congenital pulmonary airway malformations, sequestrations, pleuropulmonary blastoma, and bronchogenic cyst, but this category also includes noncystic lesions such as lobar emphysema and rare fetal neoplasms. Traditional classifications have heavily weighted cyst size as a defining feature. In this review, we emphasize the significance of the etiology in defining categories and driving patient care.