PMC7568111_01
X-ray cervical spine with flexion and extension views revealing of advanced cervical degenerative disc disease at C5-6 and C6-7 with congenital fusion of C7-T1.
SNI-11-322-g001.jpg
PMC7568111_01_SNI-11-322-g001.jpg
F1
Cervical dynamic X-rays showed a loss of the normal cervical lordosis with a congenital KFS fusion at the C7-T1 level; dynamic studies confirmed no instability at that level [Figure 1].
MRI cervical spine revealing of advanced cervical degenerative disc disease at C5-6 and C6-7 with congenital fusion of C7-T1.
SNI-11-322-g002.jpg
PMC7568111_01_SNI-11-322-g002.jpg
F2
In addition, the MR revealed bilateral, right greater than left, neuroforaminal stenosis at the C5-C6 and C6-C7 levels, without accompanying significant central stenosis [Figure 2].
CT cervical spine revealing of congenital fusion of C7-T1 vertebral bodies.
SNI-11-322-g003.jpg
PMC7568111_01_SNI-11-322-g003.jpg
F3
The CT also confirmed the presence of the KFS congenital fusion at the C7-T1 level [Figure 3].
Final AP and lateral intraoperative fluoroscopic views confirming excellent placement of the cervical disc arthroplasty devices.
SNI-11-322-g004.jpg
PMC7568111_01_SNI-11-322-g004.jpg
F4
In addition, the endplates at both levels were contoured and keels were cut to allow for implantation of the CDA devices [Table 1 and Figure 4].
POD#1 AP and lateral cervical radiographs confirming excellent placement of the cervical disc arthroplasty devices.
SNI-11-322-g005.jpg
PMC7568111_01_SNI-11-322-g005.jpg
F5
Formal upright vertical radiographs the next day, before discharge, confirmed adequate CDA positioning [Figure 5].
One-month postoperative AP and lateral cervical radiographs confirming excellent placement of the cervical disc arthroplasty devices and motion through flexion and extension.
SNI-11-322-g006.jpg
PMC7568111_01_SNI-11-322-g006.jpg
F6
At 8 postoperative months, her neurologic examination was normal, and radiographically, the CDA devices were adequately positioned [Figure 6].