Splenic artery aneurysms are rare among aneurysms, but have a relatively high mortality rate. A simple splenic artery aneurysm is clinically asymptomatic, and an aneurysm is often discovered incidentally during abdominal examination because of another abnormality. The most feared complication is rupture of the splenic artery aneurysm, causing massive bleeding into the peritoneal cavity or nearby organs.

The abdominal aorta contains a large amount of blood, and the pressure is strong. If not treated promptly, the abdominal aortic aneurysm is at high risk of rupture, and the possibility of cure is poor because blood transfusion cannot compensate for the amount of blood lost.