TY  - BOOK
AU  - Mueller, Kyle
TI  - Morphological classification of the tubercle of insertion of the transverse atlantal ligament: A computer tomography-based anatomical study of 200 subjects
SN  - 1971-4009
PY  - 2019///
KW  - *Atlanto-Axial Joint/dg [Diagnostic Imaging]
KW  - *Cervical Atlas/dg [Diagnostic Imaging]
KW  - *Ligaments/dg [Diagnostic Imaging]
KW  - Adult
KW  - Aged
KW  - Aged, 80 and over
KW  - Atlanto-Axial Joint/ah [Anatomy & Histology]
KW  - Cervical Atlas/ah [Anatomy & Histology]
KW  - Cervical Vertebrae/ah [Anatomy & Histology]
KW  - Cervical Vertebrae/dg [Diagnostic Imaging]
KW  - Female
KW  - Humans
KW  - Joint Instability/dg [Diagnostic Imaging]
KW  - Joint Instability/su [Surgery]
KW  - Ligaments/ah [Anatomy & Histology]
KW  - Male
KW  - Middle Aged
KW  - Retrospective Studies
KW  - Spinal Fusion
KW  - Tomography, X-Ray Computed
KW  - Young Adult
KW  - MedStar Washington Hospital Center
KW  - Neurosurgery
KW  - Journal Article
N2  - BACKGROUND AND PURPOSE: The atlantal tubercle is the attachment point of the transverse atlantal ligament, the main stabilizer of the atlantoaxial complex. No system of classification of the tubercle exists in the literature. We aimed to develop a morphologically based classification system of the atlantal tubercle to aid clinicians who deal with craniocervical pathology; CONCLUSIONS: The first morphologically based classification system of the atlantal tubercle utilizing CT is presented. Morphology type, especially hypoplastic type, may confer an increased risk for subsequent need for posterior fusion; MATERIALS AND METHODS: A retrospective review of computed tomography (CT) scans of the cervical spine was performed. The morphology of the atlantal tubercle was classified into four variants: rounded (classical), pointed, flattened, and hypoplastic. Age, presence, and morphological type were recorded; RESULTS: A total of 200 CT scans were identified and reviewed. The tubercle was present bilaterally in all patients. Patients were equally distributed over various age ranges. The following morphological types were recorded: rounded (227/400; 56.8%), pointed (13/400; 3.3%), flattened (126; 31.5%), and hypoplastic (34/400; 8.5%). The same type was seen bilaterally in 68% (135/200) of patients. Morphological types appear equally on the right and left side of the atlas
UR  - https://dx.doi.org/10.1177/1971400919857211
ER  -