Atlantoaxial subluxation secondary to retropharyngeal abcess in adults (Grisel's syndrome). Review of literature about a clinical case.

Grisel syndrome (GS) is a non-traumatic atlanto-axial subluxation produced after an inflammatory, infectious or postsurgical process of the upper neck region. It is a characteristic, although currently uncommon complication of acute bacterial pharyngitis in the pediatric age. Presentation in adults is even more infrequent and requires specific management.