Fig. 2

Spinal MRIs of patient #1 – #7 revealed posterior column hyperintensity (white arrow) of the cervical and thoracic spinal cord in T2-weighted midsaggital and T2-weighted axial sections. The extension of the lesion is indicated for each patient, the maximum extension was from C1 to T10. Patient #1, #3, #4, #6 and #7 showed the characteristic “inverted V-sign” on axial sections (white arrow with black contours). Persisting hyperintensities on T2-weighted imaging in patient #1 on follow-up MRI assessment after 4 months. BL: baseline, FU: follow-up