atlantoaxial subluxation

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.
References in periodicals archive ?
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).
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.
The mean values of Falls Efficacy Scale, hand grip strength, 10-meter walking time, Tinetti Balance and Gait Test, Health Assessment Questionnaire and Beck Depression Inventory scores, functional status and disease activity parameters of faller and non-faller patients Fallers(n=12) n % Falls Efficacy Scale Disease duration (years) Age (years) Hand grip strength (kg) Atlantoaxial subluxation 2 16.
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.
The most common presentations of cervical spine involvement include: atlantoaxial subluxation (65%), cranial settling (20%), subaxial subluxation (15%), or a combination thereof.
Intubation could be potentially hazardous due to a risk of atlantoaxial subluxation caused by cervical ligamentous laxity.
Patients with type IV Ehlers-Danlos syndrome may be predisposed to atlantoaxial subluxation.
10,11,24) It should be taken into consideration that the bursa in the atlantoaxial joint, after being inflamed, may lead to atlantoaxial subluxation.
Nontraumatic atlantoaxial subluxation after retropharyngeal cellulitis: Grisel's syndrome.
Non-traumatic atlantoaxial subluxation (NAAS) or atlantoaxial rotatory subluxation (AARS) was first described by Charles Bell in 1830 in a patient with syphilis, pharyngitis, and lethal spinal compression.
Being in a special region with the ability to cause morbidity and mortality, early identification of the atlantoaxial subluxation along with neurosurgical consultation is important.