What are the two most frequent complications of aneurysms?

The two most frequent complications of aneurysms are rupture and embolization. Aneurysms are localized dilations of blood vessels that can weaken the vessel wall, making rupture a significant risk. When an aneurysm ruptures, it can lead to life-threatening internal bleeding, which necessitates immediate medical attention. This is especially true for aortic aneurysms, where rupture often results in high mortality rates.

Embolization can occur when a thrombus or plaque breaks off from the aneurysm and travels downstream, potentially blocking smaller vessels and causing ischemia or infarction in the tissues supplied by those vessels. This complication is particularly relevant in the context of cerebral aneurysms, where embolic events can lead to strokes.

The other complications listed, such as stenosis and thrombosis, can occur in vascular pathology but are not the primary concerns linked with aneurysms. Similarly, while dissection and compression are serious conditions that can occur in certain settings, they do not represent the most frequent complications associated specifically with aneurysms.