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A 55-year-old man presented to our institution with tetraparesis after a ground-level fall. The presence of hyper-reflexia in four limbs led to suspicion of cervical myelopathy. Initial cervical spine plain x-ray films showed spinal canal stenosis at C1/C2, os odontoideum and two atlas-like vertebrae. Duplication of the atlas in humans …
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.