False aneurysm

Dr Donna D'Souza et al.

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

Aetiology
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 colour 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
Section: Pathology
Synonyms or Alternate Spellings:
  • Pseudoaneurysm
  • Pulsatile haematoma
  • Communicating haematoma
  • Pseudoaneurysms
  • False aneurysms

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Cases and figures

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    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 9
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    Case 10
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    fairly large pseu...
    Case 11: hepatic artery pseudoaneurysm
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    Case 12: carotid arterial pseudoaneurysm
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    Cine
    Case 13: aortic root pseudoaneurysm
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    Case 14: brachiocephalic arterial pseudoaneurysm
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    Case 15: post renal transplant
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    Case 15: on ultrasound (video)
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    Case 16: traumatic - small
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    Case 17: renal arterial pseudonaeurysm
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    Case 18: gastroduodenal artery pseudo-aneurysm
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    Case 19: radial artery pseudoaneurysm
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