Fig. 1

The patient’s cervical, thoracic and lumbar spine MRI. A–D are the cervical spine MRI on July 29, 2021. A is T2WI, and B is the T2 fat suppression sequence. It shows hyperintensity in the entire cervical spinal cord. The posterior soft tissue shows patchy hyperintensity as yellow arrow. C (T1WI enhanced sequence) shows the posterior soft tissue obviously enhanced in patches as yellow arrow. D (axial position of the cervical spine of T2WI) shows high signal in the spinal cord as white arrow. E–G is the thoracic MRI on August 5, 2021. E is T2WI, F is the T2 fat suppression sequence, showing the entire thoracic spinal cord with high signal intensity, and the yellow arrow shows the posterior soft tissue with patchy high signal. G shows the axial T2WI of the thoracic spine with high signal in the thoracic spinal cord as white arrow. H–L is the thoracic follow-up MRI and lumbar spine MRI on August 10, 2021. H (Thoracic spine of coronal T2WI) compared with the previous image (E), there is a cavity in the center of the thoracic spinal. I (T1WI enhancement), the intrathoracic spinal cord lesion shows a long strip-shaped edge enhancement, and the posterior soft tissue shows patch-like enhancement. J (T2WI fat suppression sequence of the lumbar spine) shows the posterior soft tissue with patchy hyperintensity. K (coronal enhanced sequence) shows the streak-shaped spinal membrane enhancement as red arrow. L is the axial position, showing the ring-shaped enhancement high signal in the thoracic spinal cord as white arrow