Clinical Outcome in Patients With Syringomyelia（COPSM）

Inclusion Criteria: * patients who was diagnosed as syringomyelia including: Chiari malformation， Basilar Impression， subarachnoid obstruction， patient not received surgical or interventional treatment before， patient willing and able to participate in the registry， * Hydrocephalus or other neurodegenerative disease and normal subjects. Exclusion Criteria: * patient received surgical treatment or interventional treatment before * patient is pregnant * patient unable to complete follow-up * patient with other spinal lesions * other nervous system diseases