False aneurysm

False aneurysms, also known as a pseudoaneurysm, is when there is a breach in the vessel wall such that blood leaks through the wall but is contained by the adventitia or surrounding perivascular soft tissue. A direct communication of blood flow exists between the vessel lumen and the aneurysm lumen through the hole in the vessel wall. 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.

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 6
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Article information

rID: 1326
System: Vascular
Synonyms or Alternate Spellings:
  • Pseudoaneurysm
  • Pulsatile haematoma
  • Communicating haematoma
  • Pseudoaneurysms
  • False aneurysms

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Cases and figures

  • Figure 1
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  • Figure 2: types of aneurysms
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  • Case 1: gastroduodenal artery pseudoaneurysm
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  • Case 2: right femoral
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  • Case 3: common carotid pseudoaneurysm
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  • CT Angiogram show...
    Case 4: radial artery
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  • ct carotid axial
    Case 5: carotid artery pseudoaneurysm
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  • Case 6: left ventricular pseudo-aneurysm
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  • Case 7
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  • In short segment ...
    Case 8
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  • Case 9
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  • fairly large pseu...
    Case 10: hepatic artery pseudoaneurysm
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  • Case 11: carotid arterial pseudoaneurysm
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  • Cine
    Case 12: aortic root pseudoaneurysm
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  • Case 13: brachiocephalic arterial pseudoaneurysm
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  • Case 14: post renal transplant
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  • Case 14: on ultrasound (video)
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  • Case 15: traumatic - small
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  • Case 16: renal arterial pseudonaeurysm
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  • Case 17: gastroduodenal artery pseudo-aneurysm
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  • Case 18: radial artery pseudoaneurysm
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