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.

Pathology

Pathological types
  1. true aneurysm
  2. false aneurysm (or pseudoaneurysm)
Causes
Morphology

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
  2. fusiform aneurysm: concentric, involving full circumference of the vessel wall

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

Complications
  • rupture
  • distal thromboembolism
  • pressure effects

See also

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Article Information

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

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