Page 177 - Atlas of Small Animal CT and MRI

Developmental Disorders 167

Figure 2.3.1 Chiari‐like Malformation (Canine) MR
5y F Cavalier King Charles Spaniel with inter-
mittent neck pain and C1–C5 myelopathy.
Image c is a magnification of image b.
Malformation of the occipital bone (a,b: arrow)
results in reduced caudal cranial fossa volume.
Mild enlargement of the third and fourth ven-
tricles (a) and sacculated cervical syringohy-
dromyelia (d) are evident. Herniation of the
cerebellum through the foramen magnum is best
seen on sagittal T2 images (b,c: arrowhead).

(a) T1+C, SP (b) T2, SP

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

Figure 2.3.2 Chiari‐like Malformation (Canine) MR

(a) T2, TP (b) T2, SP (c) T2, SP
6y MC Cavalier King Charles Spaniel with intermittent neck pain. Image c is a magnification of image b. Malformation of the occipital
bone (b: arrow) results in reduced caudal cranial fossa volume. Ventriculomegaly and cervical syringohydromyelia are evident (a,b).
Herniation of the cerebellum through the foramen magnum is best seen on sagittal T2 images (b,c: arrowhead).

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