Congenital anomaly of the posterior arch of C1 (Currarino type D)
Cervicalgia (neck pain)
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Absence of posterior arch of C1 with only a central "floating" segment; it seems that the posterior tubercle is attached to the occiput (see axial stack). Of note, a minuscule ovoid bony fragment posterior to the left occipital condyle.
Mild hypertrophic degenerative changes of the facet joints at several levels.