X-ray feature of spondylisthesis
A. Sunbrust appearanceB. Scot’ dog
C. Napolian hat’
D. Hairy rope sign
E. Hat on the hook deformity.
Ans.
(B) Scot dog. :
• In spndylolisthesis, X-ray shows the forward shift of upper part of the spinal column on stable vertebra below, elongation of the arch or defects may he seen. The gap in the pars interventricularis is best seen in the oblique views.
• In AP view, superior surface of slipped vertebral body may be seen.
• In oblique view, pars interventricularis better seen where it is likened to a collar around the ‘neck’ of an illustory ‘dog’ i.e. Scot dog.
In this case, the break in the pars is seen in the lateral X-ray.
• In spndylolisthesis, X-ray shows the forward shift of upper part of the spinal column on stable vertebra below, elongation of the arch or defects may he seen. The gap in the pars interventricularis is best seen in the oblique views.
• In AP view, superior surface of slipped vertebral body may be seen.
• In oblique view, pars interventricularis better seen where it is likened to a collar around the ‘neck’ of an illustory ‘dog’ i.e. Scot dog.
In this case, the break in the pars is seen in the lateral X-ray.
Oblique
view shows that on one side there is defect but on the other the break has
healed with elongation of the pars.
