Grisel's syndrome
Encyclopedia
Grisel’s syndrome is a non-traumatic subluxation of the atlanto-axial joint
Atlanto-axial joint
The Atlanto-axial joint is of a complicated nature. It consists of no fewer than four distinct joints....

 caused by inflammation
Inflammation
Inflammation is part of the complex biological response of vascular tissues to harmful stimuli, such as pathogens, damaged cells, or irritants. Inflammation is a protective attempt by the organism to remove the injurious stimuli and to initiate the healing process...

of the adjacent tissues.
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