Pseudoaneurysms

Aneurysma
spurium nach Katheterintervention über die rechte Leiste. Die direkte Verbindung von der A. femoralis communis zudem Aneurysma spurium ist nicht sicher darstellbar, somit wohl sehr klein (Stichkanal).
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Ventricular
pseudoaneurysm secondary to myocardial infarction – an exuberant presentation. a) Three chambers view demonstrates the myocardium pseudoaneurysm (star), with a narrow neck (arrow), contained by pericardial tissue. Left ventricle; LA - Left atrium; SSFP - steady state free precession sequences.
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Aneurysma
spurium der A. profunda femoris links nach komplexer Revisionsoperation einer Hüftendoprothese. Links Computertomographie: Das kleine Feeder-Gefäß (Pfeil) ließ sich nach oben als Ast der A. profuna femoris identifizieren. Man sieht neben dem lokalen kontrastierten Blutaustritt eine große Einblutung vor allem in die ischiocrurale Muskulatur. Rechts primäre Darstellung in der DSA nach Cross-over-Sondierung: Der Kontrastmittelaustritt ist vom Prothesenschaft partiell überdeckt.
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Aneurysma
spurium der A. profunda femoris links nach komplexer Revisionsoperation einer Hüftendoprothese. Nach Drehung des C-Bogens konnten die Blutung und das Feeder-Gefäß frei dargestellt und mit Coils embolisiert werden. Dabei wurde ein erster 3 mm Coil beim Versuch der Platzierung unmittelbar an der Leckagestelle in die Blutungshöhle abgeschwemmt. Nach weitereren 4 mm Coils dann komplettes Sistieren der Blutung.
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Aneurysma
spurium der rechten A. femoralis superficialis nach Herzkatheter. Die im Vergleich zu den Arterien geringere Kontrastierung des Aneurysmalumens deutet auf eine sehr schmale Verbindung hin. Links axial, rechts sagittal.
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Pseudoaneurysm
of the common carotid: an unusual complication of behcet"s disease. Ultrasound colour Doppler confirm the presence of a pseudoaneurysm of the common left carotid with a biphasic flow
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Pseudoaneurysm
of the common carotid: an unusual complication of behcet"s disease. CT Angiogram and CT neck showing pseudoanévrysm of CCM
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Pseudoaneurysm
of the common carotid: an unusual complication of behcet"s disease. VRT CT demontrating the pseudoaneurysm
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Pseudoaneurysm
of the common carotid: an unusual complication of behcet"s disease. Communication between CCA and pseudoaneurysm.
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Pseudoaneurysm
of the common carotid: an unusual complication of behcet"s disease. Contrast-enhanced CT angiogram demonstrating a 7 ×7 cm sized pseudoaneurysm at the left common carotid with mass effect on the trachea and adjacent vascular structures.
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A bloody
cough. (Axial image, vascular windows). Hypertrophied right systemic (solid white arrows) and bronchial arteries (white arrow, black border) which can be compared to the normal arterial tree on the left side of the chest.
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A bloody
cough. (Sagittal plane, lung windows) Apical mycetoma (solid black arrow), Emphysematous changes (white arrows, black border).
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A bloody
cough. DSA. Catheter in origin of right internal mammary artery (solid black arrow). Angiogram shows hypertrophic, serpiginous systemic arterial branches (black arrow, white border) and rapid shunting into the pulmonary veins (white arrows, black border).
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A bloody
cough. Catheter in origin of intercostal artery (solid black arrow). Demonstrates hypertrophic, serpiginous arteries (black arrow, white border).
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A bloody
cough. Catheter in origin of intercostal artery (solid black arrow). Demonstrates hypertrophic, serpiginous arteries (black arrow, white border) and rapid shunting into the pulmonary veins (white arrows, black border).
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Radiopaedia • CC-by-nc-sa 3.0 • de

False aneurysms, also known as pseudoaneurysms, are abnormal outpouchings or dilatation of arteries which are bounded only by the tunica adventitia, the outermost layer of the arterial wall. These are distinguished from true aneurysms, which are bounded by all three layers of the arterial wall. Pseudoaneurysms typically occur when there is a breach in the vessel wall such that blood leaks through the inner wall but is contained by the adventitia or surrounding perivascular soft tissue.

Pathology

Etiology
Location

They can involve any arterial segment or even a cardiac chamber. Examples include

Radiographic features

Some of the imaging features may be dependent on location.

Ultrasound

Due to the turbulent forward and backward flow, a characteristic yin-yang sign may be seen on color flow while a "to and fro" pattern may be seen with pulsed Doppler.

CT
  • hypoattenuating (non-contrast) or hyperattenuating (contrast-enhanced) smooth-walled sac adjacent to an artery, usually with a communication

Treatment and prognosis

The risk of rupture is higher than that of a true aneurysm of comparable size due to poor support of the aneurysm wall and thus false aneurysms generally require treatment.

Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Aneurysma spurium:
Polyarteriitis
nodosa
intarchmed.biomedcentral.com • Open Access
posttraumatisches
Aneurysma spurium
Wikipedia • CC BY-SA 3.0
management of
pseudoaneurysm
Wikipedia • CC BY-SA 3.0
femoral
artery pseudoaneurysm
Wikipedia • CC BY-SA 4.0
carotid
artery pseudoaneurysm
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Takayasu-Arteriitis
 
pediatricimaging.org • CC-by-nc-sa 4.0
penetrierendes
Aortenulkus (PAU)
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Chronische
Pankreatitis
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Akute
Pankreatitis
Wikipedia • CC BY-SA 3.0
Vaskulitis
 
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Fibromuskuläre
Dysplasie
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Aneurysma
 
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Pseudoaneurysma
des linken Ventrikels
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