Hepatic gas: Widening spectrum of causes detected at CT and US in the interventional era

Priti A. Shah, Steven C. Cunningham, Tara A. Morgan, Barry D. Daly

Research output: Contribution to journalArticlepeer-review

Abstract

The spectrum of causes of hepatic gas detected at computed tomography (CT) and ultrasonography (US) is widening. There are many iatrogenic and noniatrogenic causes of hepatic parenchymal, biliary, hepatic venous, and portal venous gas. Hepatic gas may be an indicator of serious acute disease (infarct, infection, abscess, bowel inflammation, or trauma). In other clinical scenarios, it may be an expected finding related to therapeutic interventions (such as surgery; hepatic artery embolization for a tumor or for active bleeding in acute trauma cases; percutaneous tumor ablation performed with radiofrequency, cryotherapy, laser photocoagulation, or ethanol). In some cases, hepatic gas is an incidental finding of no clinical significance. Familiarity with the expanding list of newer intervention-related causes of hepatic gas detected at CT and US, knowledge of the patient's clinical history, and a careful search for associated clues on images are all factors that may allow the radiologist to better determine the clinical relevance of this finding.

Original languageEnglish (US)
Pages (from-to)1403-1413
Number of pages11
JournalRadiographics
Volume31
Issue number5
DOIs
StatePublished - Sep 1 2011

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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