Non-traumatic atlanto-axial subluxation: Grisel's syndrome. Two case reports.

Two 8-year-old boys presented with complaints of torticollis and pain on neck turning. Both patients had a history of throat infection. Radiography and computed tomography demonstrated atlanto-axial subluxation. The patients were treated under diagnoses of Grisel's syndrome, unilateral or bilateral subluxation of the atlas on the axis associated with infection in the head or neck. Both patients were treated conservatively with bed rest, muscle relaxants, non-steroid anti-inflammatory agents, and immobilization with a soft cervical collar and cervical halter traction. The torticollis had resolved and reduction of atlanto-axial subluxation was confirmed within 2 weeks in both patients. Early diagnosis of Grisel's syndrome with appropriate antibiotics and a cervical collar, with halter traction if necessary, can achieve good outcome. Surgical treatment for the reduction of atlanto-axial subluxation should be reserved for persistent or recurrent cases.