Aneurysm

Aneurysms are focal abnormal dilatation of a blood vessel. They typically occur in arteries; venous aneurysms are rare. Aneurysms may also occur in the heart.

  1. true aneurysm
  2. false aneurysm (or pseudoaneurysm)

Atherosclerotic

Non-atherosclerotic

Morphologically there are two main types of aneurysms. The morphology is not specific for any cause:

  1. saccular aneurysm: eccentric, involving only a portion of the circumference of the vessel wall (e.g. cerebral berry aneurysm)
  2. fusiform aneurysm: concentric, involving the full circumference of the vessel wall

Occasionally a 3rd type, serpentine aneurysm has been classified as a separate entity 3.

  • rupture
  • distal thromboembolism
  • pressure effects

The word aneurysm traces its roots back to ancient Greek, specifically the word ἀνεύρυσμα (aneurysma), literally translating as an 'aperture'. It is itself a compound construction, derived from two roots, 'ἄνω-' (ano) meaning 'up' and 'εὐρύς-' (eurys), meaning 'wide' 4,5.

Article information

rID: 895
System: Vascular
Section: Pathology
Synonyms or Alternate Spellings:
  • Aneurysms

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Cases and figures

  • Figure 1: diagram
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  • Case 1: basilar tip aneurysm
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  • Case 2: gastroduodenal artery aneurysm
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  • Case 3: sub-clavian aneurysm - Doppler
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  • Case 4: infrarenal aneurysm (L2 metastases also present)
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  • Case 5: left MCA saccular aneurysm
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  • Case 6: splenic artery aneurysm
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  • Non contrast, art...
    Case 6: renal artery aneurysm
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  • Case 7: para - PCom aneurysm
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  • Case 8: feeder artery aneurysm
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  • Case 9: giant middle cerebral artery aneurysm
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  • Case 10: MCA trifurcation aneurysm
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  • Case 11: celiac artery
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  • Case 12: MCA aneurysm
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  • Case 13: ACom aneurysm
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