Inclusion Criteria:

• Patients whose AIS grade is A at 72 hours (± 6 hours) after injury
• age: 18 years to 89 years
• MRI imaging and other tests confirm the continuity of the spinal cord

Exclusion Criteria:

• The injury site is C1-C2 or C2-C3
• The patient with a spinal crd compression rate of 70% or higher.
• The patient in whom a spinal cord rupture is strongle suspected.
• The patient cannot start rehabilitation necessary for recovery of function at an early stage.
• External trauma or concurrent organ injury.
• High dose steroid therapy administered for the treatment of spinal cord injury
• History or concurrent presence of malignant tumor.
• It is inappropriate for the subject to be included in the study, in the opinion of the investigator.