aneurysm

Aneurysma der

A. cerebri media: Computertomographie, 3D-Rekonstruktion (Volumen rendering).

This image

is part of a series which can be scrolled interactively with the mousewheel or mouse dragging. This is done by using Template:Imagestack. The series is found in the category Kawasaki disease coronary aneurysms - case 001. Kawasaki-Syndrom: (mäßig ausgeprägte) Aneurysmen der Koronarien bei einem 50-jährigen, der in der Kindheit an einem Kawasaki-Syndrom erkrankt war. - 3D-Rekonstruktion VR aus einem Cardio-CT-Datensatz.

Wikipedia • CC BY-SA 3.0

Radiopaedia • CC-by-nc-sa 3.0 • de

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

atherosclerosis

Non-atherosclerotic

congenital
hypertension
vasculitis
- fibromuscular dysplasia
- infection: mycotic aneurysm, syphilis (luetic aneurysm)
hereditary connective tissue disorders
- Marfan syndrome
- Ehlers-Danlos syndrome
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. ("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

Pathology

Pathological types

Causes

Morphology

Complications

See also

Siehe auch:

und weiter: