title: Expanding upon the unilateral hyperlucent hemithorax in children.
abstract: Unilateral hyperlucent hemithorax is a common pediatric chest radiographic finding that may also be seen at computed tomography. It may result from congenital or acquired conditions involving the pulmonary parenchyma, airway, pulmonary vasculature, pleural space, and chest wall, as well as from technical factors such as patient rotation. Unilateral hyperlucent hemithorax has a broad differential diagnosis that includes unilateral emphysematous or bullous disease, pneumatocele, foreign body aspiration, Swyer-James syndrome, congenital lobar emphysema, endobronchial mass, unilateral pulmonary agenesis, proximal interruption of the pulmonary artery, scimitar syndrome, diaphragmatic hernia, and Poland syndrome. Although certain causes of unilateral hyperlucent hemithorax are clinically significant and potentially life threatening, others are of minimal or no clinical significance. When evaluating a patient with this finding, it is important to establish whether the apparent unilateral hyperlucent hemithorax is truly too lucent (hypoattenuating) or if the contralateral hemithorax is too opaque (hyperattenuating). It is imperative that radiologists be aware of the various causes of unilateral hyperlucent hemithorax so that they may diagnose the underlying condition and appropriately guide patient management.
authors.affiliation: Department of Radiology, Section of Pediatric Radiology, C. S. Mott Children's Hospital, University of Michigan Health System, 1500 E Medical Center Dr, Ann Arbor, Mich 48109, USA. jonadill@med.umich.edu
authors.forename: Jonathan R
authors.initials: JR
authors.lastname: Dillman
authors.forename: Ramon
authors.initials: R
authors.lastname: Sanchez
authors.forename: Maria F
authors.initials: MF
authors.lastname: Ladino-Torres
authors.forename: Sai G
authors.initials: SG
authors.lastname: Yarram
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Strouse
authors.forename: Javier
authors.initials: J
authors.lastname: Lucaya
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D013902:Radiography, Thoracic / Q000379:methods*; D013896:Thoracic Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D014057:Tomography, X-Ray Computed / Q000379:methods*