1.What is subcerebellar tonsil hernia malformation and what are the clinical symptoms? Answer: Atlanto-occipital malformation, also known as atlanto-occipital malformation, refers to the abnormal development of the base of the occipital bone and the first two cervical vertebrae, which includes: depression of the base of the skull, atlanto-occipital fusion, atlanto-occipital dislocation, atlanto-axial dislocation, and at the same time can be combined with spinal cord cavities. Atlanto-occipital malformations occur in people with short and thick necks and are either congenital or acquired. It can start in childhood or develop in middle age. At first, there will be neck and shoulder pain, arm numbness, weakness, unsteady walking, with the aggravation of the disease, there will be numbness and weakness of the limbs gradually aggravated, muscle atrophy, paralysis, incontinence. In severe cases, there will be quadriplegia, respiratory distress and life-threatening. 2.What kind of examination can confirm the diagnosis of this disease? How to treat it? A: The diagnosis can be confirmed by cervical spine front and side X-ray film and cervical spine magnetic resonance examination. If symptoms have already appeared, it is recommended to perform posterior decompression surgery as soon as possible to relieve the compression on the spinal cord. In some patients, the symptoms are worse after surgery than before. In this case, it is recommended to apply transcranial magnetic stimulation as early as possible to improve respiration and limb function, to help the recovery of neurological function, which is conducive to the early recovery of the patient. Therefore, before the surgery, we must ask the surgeon how to deal with postoperative respiratory distress and paralysis symptoms, if he has no way, it is recommended to choose another doctor. 3.Pre-operation has already quadriplegia and dyspnea, to what extent can the patient recover after the operation? A: I think this is a topic of concern for most patients. According to my experience, with early surgical decompression and early implementation of comprehensive rehabilitation and transcranial magnetic stimulation after surgery, patients are able to recover their respiratory and limb functions, and can fully resume walking and self-care.