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”Cock-robin” position in atlantoaxial dislocation

Anterior (A) and posterior (B) views of a child with “cock-robin” position. Note the rotation of the head to the right and the head tilt towards the left shoulder resulting from rotatory atlantoaxial dislocation. In this case the left-sided C1 facet has moved forward relative to the left-sided C2 facet, moving C1 forward and rotating to the right. (Contributed by Dr. David Choi.)

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  • Inflammatory arthritides
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