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Abscess is often unilateral and single involving posterior segments of the upper lobes and the apical segments of the lower lobes as these areas are gravity dependent when lying down. Presence of air-fluid levels implies rupture into the bronchial tree or rarely growth of gas forming organism.
*An irregularly shaped thick walled cavity with an air-fluid level is typically seen in lung abscess on chest xray. [[Image:Lung-abscess-1.jpeg|right|Lung abscess|500px]]<ref>Case courtesy of A.Prof Frank Gaillard, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/15517">rID: 15517</a></ref>
*Abscess is often unilateral and single involving posterior segments of the upper lobes and the apical segments of the lower lobes as these areas are gravity dependent when lying down.<ref name="urlwww.ijpsi.org">{{cite web |url=http://www.ijpsi.org/Papers/Vol4(2)/E042037041.pdf |title=www.ijpsi.org |format= |work= |accessdate=}}</ref> <ref name="pmid4689444">{{cite journal |vauthors=Groff DB, Marquis J |title=Treatment of lung abscess by transbronchial catheter drainage |journal=Radiology |volume=107 |issue=1 |pages=61–2 |year=1973 |pmid=4689444 |doi=10.1148/107.1.61 |url=}}</ref>
*The presence of air-fluid levels implies rupture into the bronchial tree or rarely growth of gas forming organism.The extent of the air-fluid level within a lung abscess is often the same in posteroanterior or lateral views.
*Anaerobic infection may be suggested by cavitation within a dense segmental consolidation in the dependent lung zones.
*Lung infection with a virulent organism results in more widespread tissue necrosis
*Up to one-third of lung abscesses may be accompanied by an empyema.<ref name="pmid6602513">{{cite journal |vauthors=Stark DD, Federle MP, Goodman PC, Podrasky AE, Webb WR |title=Differentiating lung abscess and empyema: radiography and computed tomography |journal=AJR Am J Roentgenol |volume=141 |issue=1 |pages=163–7 |year=1983 |pmid=6602513 |doi=10.2214/ajr.141.1.163 |url=}}</ref>
*Repeat chest radiographs must be obtained to determine the response of antimicrobial therapy.
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Overview
Chest X Ray
An irregularly shaped thick walled cavity with an air-fluid level is typically seen in lung abscess on chest xray. Lung abscess[1]
Abscess is often unilateral and single involving posterior segments of the upper lobes and the apical segments of the lower lobes as these areas are gravity dependent when lying down.[2][3]
The presence of air-fluid levels implies rupture into the bronchial tree or rarely growth of gas forming organism.The extent of the air-fluid level within a lung abscess is often the same in posteroanterior or lateral views.
Anaerobic infection may be suggested by cavitation within a dense segmental consolidation in the dependent lung zones.
Lung infection with a virulent organism results in more widespread tissue necrosis
Up to one-third of lung abscesses may be accompanied by an empyema.[4]
Repeat chest radiographs must be obtained to determine the response of antimicrobial therapy.