Doctor: DSA or CTA should be performed to confirm the diagnosis. If the aneurysm is confirmed to be an M2 bifurcation aneurysm, either craniotomy clamping or interventional embolization can be done, depending on the patient’s condition. The cost of surgery is much lower than intervention. Gamma knife is not available. Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): A week ago went to the hospital for headache CT X-ray diagnosis: left cerebral M2 artery hemangioma bifurcation 1.1 x 1.0 Check with hypertension take antihypertensive tablets Best treatment plan? Is Gamma knife surgery possible? What are the sequelae of the surgery? Approximate cost? Which hospital has the best treatment result?