Thrombosis, Infarction, and Aneurysm

Aneurysm: Definition and Classifications

An aneurysm is a localized dilation of a blood vessel, usually an artery, resulting from a weakening of the vessel wall. If left untreated, it can lead to serious complications such as rupture or thrombosis.

True vs. False Aneurysm

True Aneurysm

• Involves all three layers of the vessel wall: intima, media, and adventitia.
• Common types include saccular and fusiform aneurysms.
• Frequently occurs in the aorta due to conditions like atherosclerosis.

False Aneurysm

• Does not involve all three layers of the vessel wall.
• Results from trauma or a rupture that forms a contained hematoma.
• Common in post-surgical or post-traumatic cases.

Clinical Implications

Aneurysms can lead to complications such as rupture, embolization, or compression of adjacent structures. Early detection through imaging modalities like ultrasound or CT angiography is crucial.