Understanding the condition

What is a Brain Aneurysm?

A brain aneurysm is a weakened area in the wall of a blood vessel within the brain that causes the vessel to bulge outward. Many aneurysms cause no symptoms and are discovered during imaging performed for other reasons.

Some aneurysms remain stable over time, while others may enlarge or carry a higher risk of rupture. A ruptured aneurysm causes bleeding around the brain, known as a subarachnoid haemorrhage, and requires emergency medical treatment.

Symptoms

Common symptoms of a Brain Aneurysm

Hover your cursor over a symptom above to learn more.

When to Seek Urgent Care

Know the Warning Signs

Call emergency services immediately if you experience:

  • Sudden severe headache
  • Loss of consciousness
  • New weakness or paralysis
  • Difficulty speaking
  • Seizures
  • Sudden visual loss

These symptoms may indicate a ruptured aneurysm and require emergency medical treatment.

For emergencies, call 000 or attend your nearest Emergency Department.

Assessment & Imaging

How is it diagnosed?

Brain aneurysms are typically diagnosed using specialised imaging that allows detailed assessment of blood vessels within the brain. These investigations help determine the size, location, and shape of the aneurysm and guide treatment recommendations.

Neurological Examination

Assessment of movement, strength, sensation and reflexes.

MRI or CT Scan

MRI or CT may help confirm the diagnosis or investigate significant symptoms.

CT Angiography (CTA) or Cerebral Angiography

Treatment

Treatment Options

Treatment is based on your symptoms, examination findings, imaging, and how the condition affects your day-to-day life.

Some aneurysms may be safely monitored with regular imaging.

Management may include:

  • Clinical review
  • Repeat imaging
  • Risk factor modification
  • Blood pressure management

Treatment recommendations depend on the size, location, appearance, and estimated risk of rupture.

Treatment options may include:

  • Microsurgical clipping
  • Endovascular coiling

Related Services

Our multidisciplinary team can support assessment, treatment, rehabilitation, and surgical care where appropriate.

Treatment Procedures

Procedures to treat Brain Aneurysms