End filaments are membranous tissues without nerve components, formed by the end of the soft spinal membrane migration and differentiation of the migratory site, mainly related to dysplasia, lumbar spine trauma, tumors. 1. Dysplasia: due to the bone structure, spinal cord dysplasia, resulting in damage to the end filaments, thus the occurrence of cysts, the main manifestation of the symptoms are atypical, may appear limb disorder, pain and so on. 2. Chronic strain injury: due to chronic strain injury, resulting in prolonged, end-filament in the inflammatory stimulation can also occur cysts, lower limb activity disorders. 3. Tumor: it is a benign tumor belonging to congenital, it is a kind of rare benign tumor in the spinal canal, it grows slowly, but the condition develops for a long time, it may appear urinary and fecal dysfunction, which has an impact on the life. Terminal filament cysts are prone to misdiagnosis and underdiagnosis. The preferred method of examination is MRI to identify the cause of the disease, which is mainly treated by surgery. If end filament cysts appear, you should go to the hospital in time, under the formal guidance of the doctor for treatment, do not delay the condition.