atlantoaxial subluxation

Orthopedics An upper cervical spine subluxation which is either rotatory or anterior; rotatory AAS is more common in children, often due to apparently trivial injury; torticollis may be seen Imaging On an open mouth film, the odontoid is not equidistant between lateral masses of C1 Management Reduce subluxation and brace; recurrent or chronic cases can be treated with C1-C2 fusion; anterior AAS is due to traumatic disruption of transverse ligament Imaging Abnormal atlanto-dental interval; if anterior AAS is suspected, a CT rules out fracture; an MRI is used to evaluate the transverse ligament which, if disrupted, requires fusion; a cervical brace suffices for fracture without disruption. See Atlantodental interval.

atlantoaxial

pertaining to the atlas and axis.

atlantoaxial joint

the articulation between the first two cervical vertebrae.

atlantoaxial membrane

the fibrous sheet which closes the interarcual space between the atlas and the axis.

atlantoaxial subluxation

degeneration or malformation of the dens is seen mainly in toy breeds of dogs predisposing to displacement of the axis. Fracture of the dens can occur in any animal. Compression of the cervical cord is a common sequel that causes neck pain and varying degrees of spastic tetraparesis. Treatment is surgical stabilization. Also reported in Holstein cattle.

Mentioned in ?

References in periodicals archive ?

In another rare situation, fusion of the lower cervical spine in DISH is possibly associated with enhanced mechanical stress at the craniocervical region, which could lead to soft tissue mass, odontoid fracture, atlantoaxial subluxation, and pseudotumor and then cause severe spinal cord lesion.

Cervical Disc Arthroplasty Combined with Interbody Fusion for the Treatment of Cervical Myelopathy with Diffuse Idiopathic Skeletal Hyperostosis: A Case Report

1,2] Anterior atlantoaxial subluxation and atlantoaxial impaction are the most characteristic cervical spine disease in RA, occurring in 13-70% and 4-35% of patients, respectively, worldwide.

Resolution of a periodontoid rheumatoid pannus mass in an elderly patient treated with a rigid cervical collar: a case report and literature review

Dewar, "Rotary fixation of the atlantoaxial joint: rotational atlantoaxial subluxation," Radiology, vol.

Case Report of a Traumatic Atlantoaxial Rotatory Subluxation with Bilateral Locked Cervical Facets: Management, Treatment, and Outcome

Anterior atlantoaxial subluxation is characterized by a radiographic distance of more than 3 mm between the anterior aspect of the dens and the posterior aspect of the anterior arch of the atlas.

Conservative management of idiopathic anterior atlantoaxial subluxation without neurological deficits in an 83-year-old female: a case report

Intermittent atlantoaxial subluxation caused by a prolapsing neurofibroma.

CLINICAL MANIFESTATION OF CERVICAL NEUROFIBROMA TYPE 1 IN PATIENTS OF A TERTIARY CARE HOSPITAL

Stabilisation of atlantoaxial subluxation in the dog through ventral arthrodesis.

Joint cartilage removal associated or not to homologous implant or autologous cancellous bone graft in dogs submitted to atlantoaxial arthrodesis/ Remocao da cartilagem articular associada ou nao a implante homogeno ou enxerto autogeno de osso esponjoso em caes submetidos a artrodese atlantoaxial

There was odontoid hypoplasia (one of the most critical feature of Morquio syndrome) along with atlantoaxial subluxation in radiographs of the cervical spine performed in flexion and extension views (Figs 1C and 1D).

Roentgenographic diagnosis of mucopolysaccharidosis with particular reference to Morquio syndrome

Atlantoaxial subluxation is defined as an instability of the atlas (C1) over the axis (C2), due to failure or rupture of the ligament complex in the C1-C2 joint.

Subluxacion atlantoaxial rotatoria traumatica en adultos reporte de dos casos y revision de la literatura

10), (11) However, little is known about the occurrence of falls, fall risk, and FOF in RA and, to our knowledge, there is no study which has evaluated the relationship between atlantoaxial subluxation (AAS) and FOF in conjunction with fall risk in patients with RA.

Fear of falling, fall risk and disability in patients with rheumatoid arthritis / romatoid artritli hastalarda dusme korkusu, dusme riski ve disabilite

4,5) Craniocervical complications arise in 30% to 50% of patients who have had RA more than 7 years, while atlantoaxial subluxation with myelopathy develops in 2.

Rheumatoid arthritis of the cervical spine: clinical considerations

Intubation could be potentially hazardous due to a risk of atlantoaxial subluxation caused by cervical ligamentous laxity.