Intravertebral tumors are primary and secondary tumors that occur in various tissues of the spinal canal, such as the spinal cord, nerve roots, spinal membrane and spinal canal wall tissues. Classification of intraspinal tumors: We can classify intraspinal tumors according to the spinal cord segment in which they are located into: 1) cervical tumors; 2) thoracic tumors; 3) lumbosacral tumors. However, the commonly used clinical classification method is based on their levels in the spinal canal: tumors located in the spinal cord tissue are called intramedullary spinal cord tumors, which are most common as ventricular meningiomas, astrocytomas and hemangioblastomas; tumors located outside the spinal cord and under the spinal cord dura mater are extramedullary subdural tumors, which are most common as neurinoplasia and chordoma; tumors located outside the spinal cord dura mater are called epidural tumors, and metastatic carcinoma is most common, and cavernous hemangioma can also be seen. If the tumor is located outside the dura mater, it is called epidural tumor, with metastatic carcinoma being the most common. How does the disease evolve? Since the spinal cord tissue is delicate and soft, and is located in the hard and closed bony spinal canal, the growth of intravertebral tumors affects the spinal cord in two ways: on the one hand, it causes mechanical compression of the spinal cord, and on the other hand, it causes blood circulation obstruction of the spinal cord. In the process of tumor growth, in addition to the compression of the spinal cord, it also causes the disappearance of fat in the spinal canal, the thinning of the vertebral plate and the arch root, and the erosion of the vertebral body presenting the notch shape, so as to make the spinal canal expand, and the compression of the spinal cord is relieved, and the patients do not have any symptom for a long period of time; however, with the aggravation of the compression, once it is beyond the spinal cord’s capacity of tolerating the compression, clinically, a series of symptoms will appear one after another and will be manifested in a progressive manner. However, when the tumor develops hemorrhage or cystic degeneration, sometimes some aggravated symptoms can be temporarily relieved due to the absorption of hematoma and cystic fluid. If the growth of the tumor causes pressure on the blood vessels of the spinal cord, resulting in blood circulation obstruction of the spinal cord, causing deformation and softening of the spinal cord, or bruising and edema, the clinical symptoms will often be acutely aggravated. What tests should be done? Cerebrospinal fluid examination and kinetic test, X-ray film of the spine, and CT scan of the spinal cord can be done. However, the most commonly used test is spinal MRI. Spinal MRI has the advantages of being precise, safe, painless, capable of three-dimensional imaging and directly displaying the location and extent of the tumor and its relationship with adjacent structures, as well as secondary changes such as cavities, edema and hemorrhage, and has a greater qualitative diagnostic value. Especially, the enhanced MRI scan after injection of contrast agent can enhance the signal intensity of the tumor, which is conducive to a more accurate qualitative diagnosis. For tumors with rich blood supply, spinal angiography can clearly show the pathologic vessels of the tumor and their supplying arteries and draining veins. The application of digital subtraction angiography can remove the artifacts of the spinal column and make the pathologic blood vessels appear more clearly. For tumors with rich blood supply, embolization (blood supplying arteries) can be used before surgery to reduce the blood supply of the tumor, reduce the difficulty of surgery, and thus improve the efficacy of the postoperative treatment.