Epidural lesions of the cervical cord are one of the clinical manifestations of spinal cord compression, which refers to a group of conditions in which the spinal cord, spinal nerve roots and their supplying blood vessels are compressed by lesions of various natures. Tumors are the most common, accounting for more than 1/3 of the total number of spinal cord compression, vertebral dislocation of spinal injuries, fracture dislocation and hematoma, inflammatory and parasitic granulomas, abscesses, disc herniation, spinal vascular malformations, and some congenital spinal pathologies, etc., all of which can cause spinal cord compression. (1) Tumors (1) originated from the spinal cord tissue itself and its affiliated structures: they accounted for the vast majority, including tumors from spinal nerves, spinal cord membrane, glial cells within the spinal cord, spinal cord blood vessels and fat connective tissue around the spinal cord, among which nearly half of them (about 47.13%) were neurinosarcomas, including a small number of neurofibromas, followed by chordoma, which was considered malignant, and gliomas in the spinal cord accounted for only 10.87%. In addition, some congenital tumors, such as dermoid cysts, epithelioid cysts and teratomas, etc., also occur. The spinal cord is rich in extradural adipose tissue, so the occurrence of lipomas is also not uncommon, and tumors can occur in any part of the vertebral canal cavity, but neurosynovial meningiomas are more common in thoracic segments, and congenital tumors in lumbosacral region. (2) Malignant tumors originated from spine and other organs: they can also invade and metastasize to the spinal canal and involve the spinal cord, among which malignant tumors of lungs, breasts, kidneys and gastrointestinal tracts are the most common ones, and lymphomas and leukemias invade into the spinal cord and cause the symptoms of spinal cord compression are also seen. Inflammation: Bacterial infections in other parts of the body can cause acute abscesses or chronic true granulomas in the spinal canal and compression of the spinal cord through blood dissemination, direct spread of septic foci in adjacent tissues of the spinal column and direct implantation (“medically induced”), etc. Extradural abscesses are more common, but subdural and intramedullary abscesses are rare. Non-bacterial infectious arachnoiditis of the spinal cord, as well as injury, hemorrhage, chemical, such as intrathecal injection of drugs and some unknown causes of arachnoiditis, can cause the spinal cord and the inflammatory arachnoid adhesion, or even arachnoid formation of cysts and compression of the spinal cord, in addition, some specific inflammatory diseases, such as tuberculosis, parasitic granulomas and so on, can also cause spinal cord compression. 3.Injury Spinal cord injury is often combined with spinal cord injury, and spinal cord injury can be caused by vertebral body, vertebral arch and vertebral plate fracture, dislocation, small joint staggering, disc herniation, hematoma formation in the spinal canal and so on, leading to spinal cord compression. 4, spinal cord vascular malformation, mostly due to congenital embryonic developmental abnormalities, acquired diseases such as inflammation, injury, arteriosclerosis, etc. can cause spinal cord vascular malformation so far there is no strong data to confirm that spinal cord vascular malformations caused by spinal cord dysfunction, in addition to the expansion of malformed blood vessels expansion of the spinal cord with the role of pressure, but also due to arterial short-circuit, venous stasis resulting in ischemic damage to the spinal cord. 5, intervertebral disc herniation, also known as herniated nucleus pulposus, also belongs to the more common cause of spinal cord compression, often due to over-exertion or spinal hyperextension, hyperflexion caused by movement, there is said to be sneezing or coughing hard to lead to intervertebral disc protrusion, this is rare, intervertebral disc protrusion can also be due to the nucleus pulposus itself due to aging of the dehydration, there may be no obvious injury factors, mostly in the lower cervical segment, can be at the same time there is a more than one herniated nucleus pulposus, the disease process is long, the symptoms progress slowly, this is the spinal cord, the symptoms progress slowly. The course of the disease is long and the symptoms progress slowly, which is part of the degenerative disease of the spine. 6.Other Certain congenital spinal disorders, such as skull base depression, atlantooccipitalization, cervical fusion, spina bifida, spinal cord bulge, spinal rickets, lateral protrusion deformity, and severe hypertrophic spinal osteoarthritis, etc., can cause spinal cord compression.