PMC7125508_01
Case 1. Preoperative MRI. T2-weighted sagittal view showing cervical disc herniation at C5-C6 compressing the spinal cord.
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MRI revealed cervical disc herniation, which compressed the left side of the spinal cord primarily at the C5-6 disc level (Figure 1).
Case 1. Postoperative X-ray (lateral view). A black line (possibly air) was observed posterior to the cervical vertebrae between the bottom of the C2 vertebra and the middle of the C5 vertebra (black arrows).
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A postoperative X-ray image of the cervical spine revealed a black line posterior to the cervical vertebrae from the bottom of the C2 vertebra to the middle of the C5 vertebra (Figure 2).
Case 1. Preoperative CT myelography. (a) Sagittal view: fluid collection on the ventral side of the dura (black arrows) adjacent to the cervical disk herniation at C5-C6. (b-d) Axial views: ventral longitudinal intraspinal fluid collection (VLISFC) between C2 and T6 (white arrows).
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CSF collection on the ventral side of the dura expanding from the C2 vertebra to the T6 vertebra was identified (Figure 3). CT myelography is routinely performed 30 minutes after injection of contrast medium. CT myelography was also performed after the surgery and showed that the CSF collection at the surgical site disappeared.
PMC7125508_02
Case 2. Preoperative T2-weighted MRI. (a) Sagittal view: cervical disc herniation compressing the spinal cord was observed at C4-C5. (b) Axial view at the C7 vertebra level: fluid collection was observed on the ventral side of the dura (white arrows).
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MRI results showed cervical disc herniation, with compression on the left side of the spinal cord, predominantly at the C4-5 disc level (Figure 4(a)). CT myelography images showed CSF collection on the ventral side of the dura mater, similar to that seen in Case 1 (Figure 4(b)). CSF collection was observed between levels C4 and T7 (Figure 5).
Case 2. Preoperative myelography (axial views): VLISFC (white arrows) between C4 and T5.
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CT myelography images showed CSF collection on the ventral side of the dura mater, similar to that seen in Case 1 (Figure 4(b)). CSF collection was observed between levels C4 and T7 (Figure 5).