In clinical work, we often encounter patients’ families or patients coming to us and asking, “Doctor, do we have a benign tumor or a malignant tumor?” Is an intracranial aneurysm a tumor? Intracranial aneurysm is actually an aneurysm-like protrusion on the vascular biscuit. Since the wall of aneurysm is different from the structure of normal vascular wall, it has the possibility of rupture and bleeding when it is emotional, high blood pressure or even in a quiet state, and when it ruptures and bleeds, it has a high mortality and disability rate. Therefore, some people compare aneurysm to an “unscheduled bomb” in human brain, and once it “explodes”, the consequences are very serious. The main methods of aneurysm examination are cranial CT and CTA (CT angiography), cranial MRI and MRA (MRI angiography), which are non-invasive examination methods that greatly benefit patients. With the development of medical imaging technology, the detection rate of aneurysm is getting higher and higher. Of course, at present, whole brain angiography (DSA) is still the most definitive method of examination. Intracranial occupancy is seen on cranial CT. Cranial MRI shows aneurysm flow space shadow. Cerebral angiography is used to clarify the aneurysm. After the aneurysm is diagnosed, there are two treatment options, interventional treatment and craniotomy treatment. The choice of treatment plan should take into account the location, site, size, morphology of the aneurysm, the condition of the aneurysm-carrying artery, as well as the patient’s age and requirements. More importantly, the level of the hospital visited and the medical characteristics of the treatment team should be considered. Relatively speechless, interventional treatment is less invasive but more expensive, while open surgery is less expensive and more invasive, but this is not absolute. There is a certain amount of risk in either treatment, and there is really no guarantee that failure is only a few percent or less for a hospital doctor, or 100 percent for an individual. The doctor’s level is important, and what else? Luck? Before aneurysm embolization. After aneurysm embolization.