There is radiation pain in the nerve root distribution area where the lesion is located, such as radiation pain in the neck, back, waist or lower limbs. Postural changes can induce pain, which can be relieved by itself after rest. Pain can affect more than two nerve root distribution areas.

2. Progressive nerve root and spinal cord dysfunction

It is characterized by different parts and different degrees of motor, sensory and sphincter dysfunction: muscle weakness, intermittent claudication, loss or disappearance of sensation, incontinence, etc. Typical symptoms are intermittent claudication. Patients will feel muscle weakness and pain after walking for a certain distance, and the symptoms will disappear after rest. After walking a certain distance, the symptoms are repeated. The reason is that abnormal blood vessel stealing makes the spinal cord chronically ischemic; When blood redistributes during exercise and accumulates in skeletal muscle, spinal cord ischemia aggravates, resulting in symptoms.

3. Acute blood loss

Sudden occurrence of severe nerve root pain, quadriplegia or paraplegia, reversible blood flowing into the skull, leading to headache, vomiting or convulsions, which may cause disturbance of consciousness. When hematoma is formed, it directly destroys or compresses the spinal cord, resulting in the rapid loss of spinal cord function.

4. Combined with other malformations

It is often accompanied by spinal deformity, dorsal cutaneous hemangioma (nevus), intracranial vascular malformation, aneurysm, and corresponding hepatic or renal hemangioma.