Glossary of Medical Terms


A blood filled, balloon-like bulge in the wall of a blood vessel.


Arteriovenous Malformation - an abnormal connection between the arteries and veins in the brain or spine.

Computer tomography (CT)

A scanning tool that combines x-ray with a computer to produce detailed images of the brain.


Bleeding, which within the brain is usually referred to as cerebral haemorrhage. It can be caused by a variety of factors, such as trauma, aneurysms, AVMs, or hypertension.

Magnetic Resonance Imaging (MRI)

A scanning tool which uses magnetic fields to capture a three-dimensional image of the brain.

Pial Arteriovenous Malformation

An arteriovenous malformation of the brain supplied by brain arteries. It usually presents in childhood.

Stereotactic Radiosurgery

A method of delivering highly focused radiation to a tumour or vascular abnormality, which gradually causes it to shrink.

Vein of Galen Malformation

An arteriovenous malformation deep within the brain which usually presents in newborn babies or young children.