The cost of surgery for subcerebellar tonsillar herniation and spinal cord cavernous disease must be tailored to the specific situation at hand. Whether or not a peg-and-stick system is used and immobilized accordingly varies greatly and can potentially vary by about 20-30 thousand dollars. In some cases, subcerebellar tonsillar herniation and spinal cord cavernous disease caused by occipital foramen magnum malformation is relatively simple, and can basically be concluded by removing the atlas or enlarging the occipital foramen magnum and suspending the cerebellar tonsils, and does not require special fixation, and is one of the simplest forms of the disease. However, in the clinic, some occipital foramen magnum deformities are relatively more complicated, with relatively large subcerebellar tonsillar herniation and relatively large resected bone, which requires the application of the nail rod system and corresponding spinal immobilization. Otherwise, cervical instability may occur in the later stages and cause more serious clinical symptoms, potentially adding 20-30 thousand dollars, costing around 50-60 thousand dollars without the use of the corresponding instrumentation.