title: Antenatal sonographic findings associated with unilateral pulmonary agenesis.
abstract: BACKGROUND
  Unilateral pulmonary agenesis is a rare anomaly that has a relatively frequent association with other congenital malformations. Prognosis depends in part upon associated anomalies and whether the right or left lung is involved. The prenatal sonographic findings of this defect share some similarities with those of other intrathoracic lesions or congenital diaphragmatic hernia.
  
  
  METHODS
  Our patient had a twin gestation complicated by early discordant growth and hydramnios. The smaller fetus had cardiac dextroposition, abnormally echogenic left lung tissue, and a flattened but clearly visible left hemidiaphragm. No abdominal viscera were seen in the thoracic cavity. Postnatally, this infant was found to have agenesis of the right lung, a tracheoesophageal fistula, and pyloric stenosis.
  
  
  CONCLUSIONS
  The diagnosis of unilateral pulmonary agenesis should be considered in a fetus with the sonographic findings of a shift of the mediastinal structures, echogenic lungs, and an intact diaphragm.
authors: Department of Obstetrics and Gynecology, College of Medicine, University of Florida, Gainesville.
authors: M K
authors: MK
authors: Yancey
authors: D S
authors: DS
authors: Richards
mesh_terms: D000015:Abnormalities, Multiple / Q000000981:diagnostic imaging*; D000328:Adult; D004200:Diseases in Twins; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D007231:Infant, Newborn; D008168:Lung / Q000002:abnormalities*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D016216:Ultrasonography, Prenatal