TY - CHAP M1 - Book, Section TI - Congenital Disorders of the Lower Airways and Mediastinum A1 - Bush, Andrew A2 - Kline, Mark W. Y1 - 2018 N1 - T2 - Rudolph's Pediatrics, 23e AB - Antenatal ultrasound and, increasingly, fetal magnetic resonance imaging (MRI) diagnose many congenital lung malformations, but we now have to decide what to do for a baby affected by an abnormality that may previously have escaped detection. Many lung lesions disappear or regress from the second trimester to term, and the outcome for such fetuses generally is good. Postnatal regression of lung malformations also has been described. The dilemma in the postnatal period is whether to opt for observation or surgery. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/20 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1182915651 ER -