PMC9345127_01
(a) Initial sagittal T2-weighted image showing the abnormal high intensity (yellow arrow) of cervical cord compressed by retro-odontoid pseudotumor, (b) initial axial T2-weighted image showing markedly compressed cervical cord yellow arrow by retroodontoid pseudotumor.
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F1
The cervical MR showed a low-intensity mass behind the odontoid process that compressed the cervical spinal cord and resulted in a high intrinsic cord signal [Figure 1].
Two years later, T2-weighted images after botulinum muscle injection showing reduced retro-odontoid pseudotumor and resolution of cervical cord compression. (a) sagittal, (b) axial.
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F2
Two years later, the MR confirmed the reduction in size of the ROP mass that correlated with the regression of cord compression and the high intrinsic cord signal [Figure 2].