Cervical Variants Flashcards
What is mach effect?
unfortunate confluence of shadows
(not a Dx)
What is a pseudo-Jefferson fracture?
overhanging edges of C1 lateral masses in children only, representing the differential growth rate between C1 and C2
(finding in adults = jefferson Fx)
What is the clinical presentation of a patient showing a pseudo-jefferson fracture on x-ray?
child with no history of trauma
What is the diagnosis?
Pseudo-Jefferson fracture
What is the diagnosis and clinical significance?
Calcified lymph nodes
No clinical significance
What is the diagnosis?
Calcified lymph nodes
What is Eagle syndrome?
ossification of stylohyoid ligament + mechanical dysphagia (difficulty swallowing solids)
What is the clinical significance of stylohyoid ligament ossification?
- vertebral artery insufficiency
- fracture (flex/ext MOI)
What is the arrow pointing to?
Central incisor gap (Mach effect, not Dx)
What is the diagnosis?
Ossification of stylohyoid ligament
What is the diagnosis?
Pseudosubluxation of C2
What is the diagnosis?
Thyroid cartilage calcification
(Dense & irregular calcification within the cartilage; overlies C4-C5)
What is the diagnosis?
Facet notching
notch-like defect on posterior aspect of superior facet surface
What are nuclear impressions?
Sloped indentation of endplates
What is another name for nuclear impression?
Notochordal impression/persistency
What is the diagnosis?
Nuclear impressions
(At all cervical levels)
What is the diagnosis?
Nuclear impressions
(Inf. endplate of C6, both endplates of C7)
What is the clinical significance of nuclear impressions
Normal variant
What are nuchal bones?
- Long-standing degenerative ossification post. to lower cervical SPs w/in ligamentum nuchae
- exhibit smooth bony cortex and are often angular or ovoid
What is the diagnosis?
Nuchal bones
What is the clinical presentation of a patient with nuchal bones?
No history/relationship to previous trauma or pain syndromes
What is the diagnosis?
Intercalary bone
What are intercalary bones?
Discal ossifications, usually triangular in shape, found in ant. annular fibers of an IVD
What is the diagnosis?
Intercalary bones
What is the suspected etiology of Intercalary bones?
Degenerative ossification
What is this? What is the clinical significance?
Tracheal ring calcification
Not clinically significant