Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

508 Small Animal Radiolo g y and Ultrasono graphy
Fig. 4-40 A 6-month-old male mixed breed dog had a transverse,
midshaft radius and ulna fracture immobilized in a cast 4
weeks previously. The fractures have healed with moderate
malalignment. There is a loss of bone density distal to the fracture.
This is due to immobilization of the limb. Diagnosis: Healed
fracture with malunion and bone atrophy. The malalignment and
bone atrophy did not affect this dog’s return to normal limb use.
Fig. 4-41 A 6-year-old female Great Dane with an acute onset of right
foreleg lameness. The carpus was swollen. There is soft-tissue swelling
surrounding the radial metaphysis. There is extensive bony destruction
with the cortex eroded at several sites. Mild periosteal reaction is present.
There is poor demarcation between the involved and normal bone.
Diagnosis: Osteosarcoma.