PMC8046472_01
Case 1: (a) Pre-operative picture of a huge tumor at the neck. (b) Pre-operative X-ray. A lateral X-ray showed 45  cervical kyphosis at C3-6 with dystrophic changes. (c) Angiograms showed an arteriovenous malformation at C2-7. (d) Post-operative X-ray after laminectomy and cervical kyphosis had progressed from 45  to 60 . (e) Diagram showing the operative strategy. The arrow points to the superior thyroid artery, and the arrowhead indicates the peroneal artery. (f, g, and h) X-rays obtained 15 years after the operation showing good bone union and 50  kyphosis (neutral, flexion, and extension of lateral view).
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F1
There was a huge neurofibroma at the back of his neck (Fig. 1a). A lateral X-ray showed 45  cervical kyphosis at C3-6 with dystrophic changes (Fig. 1b) and angiograms showed an arteriovenous malformation at C2-7 (Fig. 1c). However, the kyphotic deformity progressed to 60 , and 6 months after the first operation (Fig. 1c), the patient underwent anterior fusion with VFG at C2-C7 (Fig. 1d). When he was examined 15 years after the operation, a lateral X-ray showed atlantoaxial subluxation and 50  kyphosis (Fig. 1e-h).
PMC8046472_02
Case 2: (a) Pre-operative lateral X-ray showing 95  kyphosis in flexion. (b) Pre-operative midsagittal magnetic resonance imaging (MRI) showing diastematomyelia at C6-T1. (c) Post-operative midsagittal MRI showing decompression of spinal cord at C6-T1. (d-h) Computed tomography and X-ray images obtained 18 years after the operation showing good bone union and global alignment (coronal and neutral, flexion, and extension of lateral view).
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F2
A lateral X-ray showed a 60  cervical kyphosis with dystrophic changes at C4-7 (Fig. 2a). Magnetic resonance imaging (MRI) showed diastematomyelia at C6-T1 (Fig. 2b). Post-operative MRI showed sufficient decompression of the spinal cord (Fig. 2c). Computed tomography and X-ray showed that cervical alignment had been maintained with 50  kyphosis (Fig. 2d-h).