Page 346 - Atlas of Small Animal CT and MRI

336 Atlas of Small Animal CT and MRI

Figure 3.4.6 Osteosarcoma (Canine) CT

(a) CT+C, TP (b) CT+C, TP (c) CT+C, TP

(d) CT+C, SP (e) CT+C, DP
8y FS Doberman Pinscher with 1‐week history of progressive paraparesis. Transverse images are at the midbody (a) and caudal end (b)
of L4 and at the cranial end of L5 (c). An osteodestructive mass is seen within the body, left pedicle, lamina, and vertebral canal of L4
(a,b,d: arrows) and has extended caudally into the body of L5 (c: arrow). CT myelography confirms left‐sided spinal cord compression
(a,b,e: arrowhead). There are also incidental findings of ventral spondylosis (c: arrowhead) and an L3–4 vacuum sign (d: arrowhead).
Postmortem examination revealed osteosarcoma. The imaging features of this neoplasm are somewhat unusual given the purely
destructive appearance that suggests an osteoclastic or primitive cell lineage.

336