PMC9610123_01
Magnetic resonance imaging (MRI) of the thoracic spine. (a) Sagittal T2-weighted image shows central canal stenosis at Th10/11, Th11/12. (b) Axial T2-weighted image reveal dorsal extradural cystic lesion and fluid within the right facet joint at Th10/11. (c) Axial T1-weighted image shows dorsal hypointense lesion. (d) Gadolinium-enhanced T1-weighted MRI showed peripherally enhancing mass in the extradural space.
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F1
The thoracic MR showed central canal stenosis through the T10-12 levels and a dorsal extradural cyst at the T10/11 level that enhanced with contrast and contributed to cord compression [Figures 1a-d]. The computed tomography additionally demonstrated bridging anterior DISH ossification from T4 to T10 [Figures 2a and b].
Computed tomography scan images of the whole spine. (a) Sagittal view shows horizontally oriented ossification of anterior longitudinal ligament in thoracic spine and gas-containing disc at multiple levels. (b) 3D reconstruction image reveals bridging of vertebral bodies from Th4 to Th10. (c) Axial image shows gas within Th10/11 facet joint.
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F2
The thoracic MR showed central canal stenosis through the T10-12 levels and a dorsal extradural cyst at the T10/11 level that enhanced with contrast and contributed to cord compression [Figures 1a-d]. The computed tomography additionally demonstrated bridging anterior DISH ossification from T4 to T10 [Figures 2a and b]. A vacuum phenomenon was noted in T10/11 adjacent facet joint [Figure 2c].
Postoperative image of MRI. Cyst removal and spinal decompression are confirmed.
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F3
The patient sustained no perioperative/postoperative complications and the postoperative imaging studies showed decompression of spinal cord with no residual cyst [Figure 3].