A brain aneurysm, or cerebral aneurysm may be present at birth or develop after injury. Symptoms include sudden severe headache, nausea, vomiting, visual difficulties and loss of consciousness.
Brain aneurysms rarely rupture, but related bleeding puts patients at high risk of severe neurologic injury and death. Patients with unruptured aneurysms may be monitored or treated with endovascular coil embolization, blood flow diversion, microsurgical clipping or vascular neurosurgery. A ruptured cerebral aneurysm requires emergency treatment.