<unk><unk> s are neoplasms located in the<unk> <unk> .  Extradural<unk> s are more common than intradural neoplasms.
Depending on their location, the<unk> s can be:
Extradural - outside the dura mater lining (most common)
Intradural - part of the dura
Intramedullary - inside the<unk> <unk> 
Extramedullary- inside the dura, but outside the<unk> <unk> 
Intramedullary - inside the<unk> <unk> 
Extramedullary- inside the dura, but outside the<unk> <unk>
Spinal cord tumor
Spinal tumor
Spinal disc herniation
Spinal cord injury
Motor neuron disease
Spinal stenosis
Basal ganglia disease
Adrenomyeloneuropathy