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MedPix® Medical Image DatabaseDisease Topic 5323
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Contributor: Kevin Banks - Brooke Army Medical Center
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More Like This ? Swyer-James Syndrome
Factoid 5323 - Created: 2003-12-10 23:49:53-05 - Modified: 2003-12-16 11:29:59-05
ACR Codes: 6.2
Swyer-James Syndrome is also called "unilateral hyperlucent lung". This a radiologic *classic* where one lung field is more radiolucent (darker) on chest films.

Etiology: likely secondary to childhood adenoviral infection with subsequent acute obliterative bronchiolitis, bronchiectasis, and distal air-space destruction

Clinical Presentation: varies from asymptomatic to DOE, usually relates a history of recurrent childhood respiratory infections

Radiographic Findings
- increased lucency in affected lung (usually entire lung with lobar/subsegmental distribution having been reported)
- small ipsilateral hemithorax with normal-to-decreased volume
- small ipsilateral hilum
- air trapping on expiratory films
- V/Q scan classically shows decreased perfusion as well as diminished ventilation with delayed washout
- angio will show a “pruned tree” appearance of affected side’s pulmonary vasculature
Reference(s):
Dahnert W. Radiology Review Manual. 5th ed. 2002 Lippincott Williams and Wilkins
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Location:
Chest, Pulmonary (ex. Heart) 		Sublocation:
none selected 		Category:
Infection, generalized
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Prepared by: Kevin Banks
Affiliation: Brooke Army Medical Center - || - Author Profile
Approved by: Ernesto Torres LTC MC
Affiliation: Brooke Army Medical Center - || - Editor Profile
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