PMC6743703_01
Locked facets are demonstrated at the C6/7 level. (a-d) On the right. (a and c) And left side. (b and d). and C7/T1 level. (f-i) On the right side. (f and h) And the left side. (g and i). Grade 1 anterolisthesis of C7 on T1 and a disc arthroplasty at the C6/7 level are appreciated. (e). Disruption of the ligamentum flavum and cord signal change is seen from C5 to T2 (j).
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F1
A computed tomography (CT) scan of the cervical spine demonstrated bilateral locked facets at C6/C7 [Figure 1a-d] and C7/T1 [Figure 1f-i] with Grade 1 anterolisthesis at C7/T1. There was also a C6/C7 arthroplasty that was performed a few weeks before the event [Figure 1e]. The magnetic resonance imaging (MRI) scan demonstrated injury to the C6/C7 and C7/T1 ligaments: the ligamentum flavum and interspinous, anterior, and posterior longitudinal ligaments [Figure 1j].
Postoperative sagittal images demonstrating posterior cervicothoracic instrumentation and fusion from C4 to T2 at midline. (a) And lateral views. (b and c) With the facets at the respective side.
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F2
A postoperative CT scan demonstrated adequate localization of the instrumentation and alignment despite slight unilateral facet subluxation at C6/C7 and minor unilateral facet subluxation at C7/T1 [Figure 2].