4. Cervical Spine Flashcards
what are the features in the odontoid view
lateral masses of C1 on each side of the odontoid peg
odontoid peg of C2 in the middle
distance between the odontoid peg and lateral masses should be equidistant
lateral masses of C1 and C2 aligned
what are the 4 lines of the spine used to check alignment
from anterior to posterior
anterior vertebral line
posterior vertebral line
spinolaminar line
posterior spinous line
what is a retropharyngeal infection
massive soft tissue space between bone and airway
pocket of pus
what is DISH
abnormal calcification/bone formation of soft tissues surrounding the spinal joints and also the peripheral/appendicular skeleton
bone formation along the anterior longitudinal ligament and or the posterior ligament as well
what might happen in DISH to the adjacent spinal levels
fuse
what is the most common spine that is affected by DISH
thoracic
what is ankylosing spondylitis
systemic disorder
inflammation of axial skeleton
accentuated kyphosis
what is the characteristic of AS on images
bamboo spine
what is a jefferson fracture
compression fracture of C1 bony ring
what can be seen on the image for a jefferson fracture
lateral masses split and transverse ligament tear
displacement of the lateral masses of C1 beyond the margins of C2 body
what is a bilateral facet joint dislocation
more than 1/2 of vertebrae has displaced
what is a teardrop fracture
post ligament disruption and anterior compression of vertebrae
what are the 3 radiographic features of the teardrop fracture
prevertebral teardrop fragment (avulsion fracture)
posterior portion of vertebrae may be displaced into the spinal canal
spinal cord may be compressed
what is a hangmans fracture
fracture through the pars interarticualris of C2
what is the mechanism of a hangmans fracture
hyperextension of neck
