I72.5: Aneurysm and dissection of other precerebral arteries

Aneurysm and dissection of other precerebral arteries is a medical condition where the walls of the arteries supplying blood to the brain, but excluding the carotid and vertebral arteries, develop a bulge, also known as an aneurysm, or tear, referred to as a dissection. These problems can cause the blood vessel to weaken and potentially lead to life-threatening complications if ruptured. It usually doesn't cause any symptoms unless it grows large or ruptures. However, when symptoms do occur, they can include sudden, severe headache, nausea, vomiting, blurred or double vision, dizziness,, sensitivity to light, or seizures. This condition can be caused by high blood pressure, atherosclerosis (hardening of the arteries), or certain genetic conditions. A person's risk can also increase with age, smoking, excessive alcohol consumption, or drug abuse. It is important to note that an aneurysm or dissection can occur without a known cause.