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FIG 4. Serial axial CT images.
A, Initial axial CT scan at the cranial side of C6 vertebral body shows a small lesion suggesting a gas (pneumatocyst). The next to the lesion, there was also a small fluid-filled cystic lesion in C6 body.
B, Second axial CT scan at the cranial side of C6 vertebral body shows a new gas-containing lesion in the C6 body. It seemed that the fluid-filled cystic lesion in C6 body was partially replaced with gas.
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