An aneurysm is a dilated section of an artery. It can occur in arteries of various sizes. It can occur in the largest artery in the body, the aorta. It also can occur in blood vessels that serve various parts of the central nervous system, including the spine. If the artery in the spine has an aneurysm, it is referred to as a spinal aneurysm. Isolated spinal aneurysms are rare and do not occur, but it is similar in concern to a cerebral aneurysm, an aneurysm of the arteries to the brain, in that it can cause bleeding around the spinal cord.
The primary concern is if it causes bleeding. Significant bleeding would require surgery. If it is detected at an early stage, it may only need periodic monitoring. If it is larger, then it may need treatment, such as surgical clipping or placing a coil within the aneurysm. A Neurosurgeon would be the specialist to be able to determine what would need to be done.