Aneurysm
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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
- congenital
- atherosclerosis
- hypertension
- vasculitis
- hereditary connective tissue disorders
- fibromuscular dysplasia
- infection: mycotic aneurysm, syphilis (luetic aneurysm)
- trauma
- iatrogenic
- myocardial infarction: may cause left a ventricular aneurysm
- flow related (in cerebral AVM, contralateral ICA occlusion etc)
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
- fusiform aneurysm: concentric, involving full circumference of the vessel wall
Occasionally a 3rd type, serpentine aneurysm has been classified as a separate entiityentity 3.
Complications
- rupture
- distal thromboembolism
- pressure effects
See also
-<li>myocardial infarction: may cause left ventricular aneurysm</li>- +<li>myocardial infarction: may cause left a ventricular aneurysm</li>
-</ol><p>Occasionally a 3<sup>rd</sup> type, <strong>serpentine aneurysm</strong> has been classified as a separate entiity <sup>3</sup>.</p><h5>Complications</h5><ul>- +</ol><p>Occasionally a 3<sup>rd</sup> type, <strong>serpentine aneurysm</strong> has been classified as a separate entity <sup>3</sup>.</p><h5>Complications</h5><ul>
-<li><a title="Saccular cerebral aneurysms" href="/articles/saccular-cerebral-aneurysm">cerebral berry aneurysm</a></li>- +<li><a href="/articles/saccular-cerebral-aneurysm">cerebral berry aneurysm</a></li>
Images Changes:
Image 8 DSA (angiography) (Internal carotid artery) ( update )
Caption
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Para - PcomPCOM Aneurysm
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