A 51-year-old female suffered from tetraparesis and frequently paroxysmal tics of extremities for 3 months. ATT treatment quickly improved her symptoms. After 2-year ATT, she fully recovered without visible symptoms. The MRI changes are as follows: (a) sagittal T1-weighted MRI showing focal thickening of the cord at C2-C3 level, (b) sagittal T2-weighted MRI showing a focal demyelinating lesion, (c) axial T2-weighted MRI showing the lesion to involve the whole cord, (d) sagittal T2-weighted MRI after 6 months of treatment, showing the swelling of the cervical spinal cord and patchy abnormal signal have resolved, (e) axial T2-weighted MRI showing an abnormal signal remains, (f) sagittal T1-weighted MRI after 2 years of treatment is normal, (g) sagittal T2-weighted MRI after 2 years of treatment revealing no abnormal signals, and (h) axial T2-weighted cord MRI after 2 years of treatment.