portalvenöses Gas

Mesenteriale
Ischämie mit Pneumatosis intestinalis (vor allem Zoekum-Pol und Rectum) und Gas in Mesenterial- und Lebervenen.
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Pneumatosis
intestinalis und hepatis bei nekrotisierender Enterokolitis
Wikipedia • CC BY-SA 4.0
Successful
medical management of emphysematous gastritis with concomitant portal venous air: a case report. CT of the abdomen showing air in the stomach wall and portal venous system. Black arrow: Portal venous air. White arrows: Air in the stomach wall.
jmedicalcasereports.biomedcentral.com • CC-by-2.0
Darmischämie
mit Pneumatosis und portalvenösem Gas. Die Befund sind am besten im Lungenfenster zu sehen.
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Pneumatosis
intestinalis in der Computertomographie coronar im Lungenfenster. Man erkennt neben Gaseinschlüssen in der Darmwand auch Gas in der Magenwand und in zahlreichen Gefäßen, so auch in den Pfortaderästen der Leber.
Wikipedia • CC BY-SA 3.0
Portomesenteric
venous gas in diverticular disease. Hyperechoic foci within the liver (arrow) corresponded to portal venous gas.
www.eurorad.org • CC by-nc-sa-4.0
Pneumatosis
intestinalis versus pseudo-pneumatosis: review of CT findings and differentiation. Intrahepatic and tubular gas in a venous branch in a 45-year-old woman with superior mesenteric artery thrombosis (SMA). a Sagittal contrast-enhanced CT shows SMA thrombosis (arrow). b Axial contrast-enhanced CT shows intramural gas of pneumatosis intestinalis (arrow). c Axial CT (lung window) shows tubular lucency in a venous branch (arrow), consistent with mesenteric venous gas. d Axial contrast-enhanced CT shows extensive intrahepatic portal venous gas (arrow)
insightsimaging.springeropen.com • CC-by-2.0
Gas in
Mesenterialvenen bei Mesenterialischämie
Wikipedia • CC BY-SA 4.0
Ischaemic
bowel disease. Axial view shows no appreciable mural enhancement in most of the small and large bowel loops. Splanchnic venous gas streaking the distal venous tributaries reaching non-enhanced bowel loops.
www.eurorad.org • CC by-nc-sa-4.0
Ischaemic
bowel disease. Axial view shows portal venous gas with preferential affection of the left hepatic lobe. Bilateral pleural effusion and ascites.
www.eurorad.org • CC by-nc-sa-4.0
Bowel
ischaemia. Coronal section showing air in the dilated intestinal walls as well as in the hepatic veins.
www.eurorad.org • CC by-nc-sa-4.0
Pneumatosis
intestinalis versus pseudo-pneumatosis: review of CT findings and differentiation. Intramural and portomensenteric venous gas in a 66-year-old asymptomatic man after duodenal ulcer repair. a Axial unenhanced CT shows diffuse, bubble-like and curvilinear intramural gas collections (arrows) throughout the small bowel, consistent with pneumatosis intestinalis. b, c Axial CT images at two different abdominal levels show diffuse branching lucency in the mesenteric vessels (arrow, b) and the periphery of the liver indicating portal vein gas (arrow, c). d Axial unenhanced CT, acquired at the same level as a after 10 days of follow-up, shows complete resolution of pneumatosis intestinalis following a benign clinical course
insightsimaging.springeropen.com • CC-by-2.0
Gas in
Pfortaderästen bei Mesenterialischämie
Wikipedia • CC BY-SA 4.0
Bowel
ischaemia. Axial section showing air in the hepatic veins.
www.eurorad.org • CC by-nc-sa-4.0
An Unusual
Case of Air in the Inferior Mesenteric Vein. Tubular-shaped air within the inferior mesenteric vein (solid white arrow), thickening of the vein wall and streaking densities within the perivascular fat.
www.eurorad.org • CC by-nc-sa-4.0
Portomesenteric
venous gas in diverticular disease. Non-contrast CT showed a low attenuation branching pattern in the periphery of the liver consistent with portal venous gas.
www.eurorad.org • CC by-nc-sa-4.0
nicht verwechseln mit: Aerobilie
Radiopaedia • CC-by-nc-sa 3.0 • de

Portal venous gas is the accumulation of gas in the portal vein and its branches. It needs to be distinguished from pneumobilia, although this is usually not too problematic when associated findings are taken into account along with the pattern of gas (i.e. peripheral in portal venous gas, central in pneumobilia).

Pathology

Etiology

Although traditionally considered a harbinger of death, portal venous gas is increasingly recognized in a variety of conditions, many of which do not carry as high mortality or morbidity risks.

Causes of portal venous gas are best divided according to the age of the patient:

Radiographic features

Plain X-ray

Branching lucencies projected in the liver or vessels coursing towards the liver.

Ultrasound

Gas in the portal veins usually manifests as echogenic mobile foci in the lumen of the portal vein. Doppler US will demonstrate sharp spikes on both sides of the basal line on the Doppler spectral display .

CT

Similar to X-ray features, portal venous gas manifests on CT as branching gaseous foci of low density in the liver, portal vein and its tributaries. The vessel-gas interface may cause streak artifact. Typically, the gas in the liver is peripheral which helps differentiate it from more central gas due to pneumobilia).

See also

Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu portalvenöses Gas:
Pneumatosis
intestinalis
Wikipedia • CC BY-SA 4.0
Aerobilie
 
Wikipedia • CC BY-SA 4.0
Divertikulitis
 
Wikipedia • CC BY-SA 4.0
Mesenterialinfarkt
 
Wikipedia • CC BY-SA 3.0
Nekrotisierende
Enterokolitis
pediatricimaging.org • CC-by-nc-sa 4.0
Gas in
Pfortader und Mesenterialvenen bei mesenterialem Infarkt
Wikipedia • CC BY-SA 4.0
Dünndarmischämie
 
Wikipedia • CC BY-SA 4.0
Kolorektales
Karzinom
Wikipedia • CC BY-SA 4.0
Vena portae
 
Wikipedia • Public domain
Cholezystitis
 
Wikipedia • CC BY-SA 4.0
Chronisch
obstruktive Lungenerkrankung
Wikipedia • CC0
abnormales
Gas im Abdomen
Wikipedia • CC BY-SA 4.0
Appendizitis
 
Wikipedia • CC BY-SA 4.0