What rate does an aneurysm grow?

The growth rate of aneurysms varies depending on several factors, including the type of aneurysm, its location, and the individual's overall health and medical history. In general, aneurysms grow slowly over time. However, some aneurysms may grow rapidly, especially if they are large or located in a critical area.

Small aneurysms (less than 5 millimeters in diameter) may not grow significantly or may even remain stable in size. However, larger aneurysms (greater than 5 millimeters) have a higher risk of growth and rupture. The growth rate of large aneurysms can vary widely, ranging from a few millimeters per year to several centimeters per year.

Certain types of aneurysms are known to grow more rapidly than others. For example, saccular (berry) aneurysms, which are the most common type of brain aneurysm, tend to grow more slowly than fusiform aneurysms, which are more common in the aorta.

Furthermore, the location of an aneurysm can influence its growth rate. Aneurysms located in certain areas, such as the neck or the cerebral arteries in the brain, may be more prone to rapid growth due to increased pressure and stress in those regions.

Additionally, the individual's overall health and lifestyle can impact the growth rate of an aneurysm. Factors such as high blood pressure, smoking, obesity, and certain genetic conditions can contribute to the growth and progression of aneurysms.

Regular monitoring and surveillance of aneurysms are crucial for assessing their growth rate and determining the appropriate treatment options. Imaging techniques, such as magnetic resonance angiography (MRA) or computed tomography angiography (CTA), are used to track the size and growth of aneurysms over time.