Aneurysma

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
  • true aneurysm
  • false aneurysm (or pseudoaneurysm)
  • Causes

    Atherosclerotic

    Non-atherosclerotic

    Morphology

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

  • saccular aneurysm: eccentric, involving only a portion of the circumference of the vessel wall. ("Berry" aneurysm).
  • fusiform aneurysm: concentric, involving full circumference of the vessel wall
  • Occasionally a 3 type, serpentine aneurysm has been classified as a separate entity .

    Complications
    • rupture
    • distal thromboembolism
    • pressure effects

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    See also