Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

682 Small Animal Radiolo g y and Ultrasono graphy
Fig. 6-19 A 4-year-old male Springer Spaniel had progressive weakness of
the hind limbs over the prior 6 months. The myelogram reveals tortuous,
tubular structures in the ventral extramedullary-intradural space. Diagnosis:
Arteriovenous malformation.
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D E G E N E R AT I V E D I S E A S E
Spondylosis Deformans. Spondylosis deformans is the most common degenerative disease
that affects the spinal column. This produces a partial or complete bony bridge between the
caudal aspect of one vertebral body and the cranial aspect of the adjacent vertebral body
(Fig. 6-20). 101,102 The bony proliferation, although frequently present on the ventral and lateral
surfaces of the vertebral bodies, rarely is present on the dorsal portion and therefore