Page 299 - Atlas of Small Animal CT and MRI

Developmental Disorders 289

Figure 3.1.9 Cervical Spondylomyelopathy (Canine) CT & MR
10mo MC Rhodesian Ridgeback with myelo­
pathy neuroanatomically localized to C1–5.
Transverse images are at the level of C2–3.
Marked hypertrophy and remodeling of the
C2 and C3 articular facets is seen on the
CT image, associated with subchondral bone
defects (a: arrowheads) and encroachment of
new bone into the vertebral canal (a: arrows).
Comparable MR images similarly document
facet hypertrophy (b,c: arrowheads) and
encroachment into the vertebral canal caus­
ing primarily lateral spinal cord compression
(b,c: arrows). The sagittal plane image shows
attenuation of the dorsal and ventral suba­
(a) CT, TP (b) T1, TP rachnoid columns but no significant change
in cord diameter in this plane (d: arrow). A
hemilaminectomy was performed to relieve
compression.

(c) T2, TP (d) T2, SP

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