Aneurysm
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An aneurysmAneurysms is aare 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 ventricular aneurysm
- flow related
( in(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 entiity 3.
Complications
- rupture
- distal thromboembolism
- pressure effects
Related linksSee also
-<p>An <strong>aneurysm</strong> is a focal abnormal dilatation of a blood vessel. They typically occur in arteries; venous aneurysms are rare. Aneurysms may also occur in the heart.</p><h4>Pathology</h4><h5>Pathological types</h5><ol>- +<p><strong>Aneurysms</strong> are focal abnormal dilatation of a blood vessel. They typically occur in arteries, venous aneurysms are rare. Aneurysms may also occur in the heart.</p><h4>Pathology</h4><h5>Pathological types</h5><ol>
-<li>infection : <a href="/articles/mycotic-aneurysm">mycotic aneurysm</a>, syphilis (<a href="/articles/luetic-aneurysm">luetic aneurysm</a>)</li>- +<li>infection: <a href="/articles/mycotic-aneurysm">mycotic aneurysm</a>, syphilis (<a href="/articles/luetic-aneurysm">luetic aneurysm</a>)</li>
-<li>flow related ( in cerebral AVM, contralateral ICA occlusion etc)</li>- +<li>flow related (in cerebral AVM, contralateral ICA occlusion etc)</li>
-<strong>saccular aneurysm</strong> : eccentric, involving only a portion of the circumference of the vessel wall</li>- +<strong>saccular aneurysm</strong>: eccentric, involving only a portion of the circumference of the vessel wall</li>
-<strong>fusiform aneurysm</strong> : concentric, involving full circumference of the vessel wall</li>-</ol><p>Occasionally a 3rd type, <strong>serpentine aneurysm</strong> has been classified as a separate entiity <sup>3</sup> .</p><h5>Complications</h5><ul>- +<strong>fusiform aneurysm</strong>: concentric, involving full circumference of the vessel wall</li>
- +</ol><p>Occasionally a 3rd type, <strong>serpentine aneurysm</strong> has been classified as a separate entiity <sup>3</sup>.</p><h5>Complications</h5><ul>
-</ul><p> </p><h4>Related links</h4><ul>- +</ul><h4>See also</h4><ul>
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