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

Share article

Article information

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

Support Radiopaedia and see fewer ads

Cases and figures

  • Figure 1: diagram
    Drag here to reorder.
  • Case 1: basilar tip aneurysm
    Drag here to reorder.
  • Case 2: gastroduodenal artery aneurysm
    Drag here to reorder.
  • Doppler
    Case 3: sub-clavian aneurysm - Doppler
    Drag here to reorder.
  • Case 4: infrarenal aneurysm (L2 metastases also present)
    Drag here to reorder.
  • Case 5: left MCA saccular aneurysm
    Drag here to reorder.
  • Case 6: splenic artery aneurysm
    Drag here to reorder.
  • Non contrast, art...
    Case 6: renal artery aneurysm
    Drag here to reorder.
  • Bone - overlapped
    Case 7: para - PCOM aneurysm
    Drag here to reorder.
  • LAT - Capillary p...
    Case 8: feeder artery aneurysm
    Drag here to reorder.
  • Case 9: giant middle cerebral artery aneurysm
    Drag here to reorder.
  • VRT
    Case 10: MCA trifurcation aneurysm
    Drag here to reorder.
  • Case 11: celiac artery
    Drag here to reorder.
  • Case 12: MCA aneurysm
    Drag here to reorder.
  • Bilobed aneurysm ...
    Case 13: ACOM aneurysm
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.