Grade 1 (3 mm) anterolisthesis of C3 on C4 as well as C4 on C5.
C4/5: Posterior disc osteophyte complex results in moderate central canal narrowing and severe bilateral foraminal stenosis.
C5/6: Posterior disc osteophyte right complex results in severe central canal stenosis and presumed flattening of the cord. Severe bilateral foraminal stenosis.
C6/7: Posterior disc osteophyte complex results in moderate central canal narrowing and bilateral (left > right) moderate/severe foraminal stenosis.
At the atlanto-dens articulation there is loss of joint space and possible ankylosis Throughout the remainder of the cervical spine there is mild central canal and foraminal narrowing, as well as facet joint arthropathy at multiple levels. Soft tissues of the neck are unremarkable and the lung apices are clear.
Conclusion:
Severe central canal stenosis maximal at C5/6 due to posterior disc osteophyte complex in the context of multilevel degenerative change is outlined above.