Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

528 Small Animal Radiolo g y and Ultrasono graphy
Fig. 4-70 A 1-year-old male
English Bulldog was in a dog fight 3
weeks previously and has had intermittent
lameness since that time.
Soft-tissue swelling extended from
the stifle to the hock. There is bony
proliferation with increased density
within the medullary canal involving
the proximal one-third of the right
tibia. A dense bony fragment is present
in the medial cortex of the proximal
tibia (arrows). This is
surrounded by an area of radiolucency.
There is extensive periosteal
proliferation medial to this dense
fragment. This fragment represents
a sequestrum. Diagnosis:
Osteomyelitis.
Fig. 4-71 A 5-year-old male German Shepherd dog
was in a fight with another dog 3 weeks earlier.
Clinically, there is swelling involving the left forelimb.
Diffuse soft-tissue swelling is evident radiographically.
There is periosteal proliferation involving the middle
portions of the radius and ulna. The endosteal surfaces of
both the radius and ulna are sclerotic. Diagnosis:
Osteomyelitis.
Hematogenous osteomyelitis in young dogs may involve the metaphyses. Irregular
bony lysis and periosteal proliferation will be seen. This lesion may mimic hypertrophic
osteodystrophy; however, unlike hypertrophic osteodystrophy, the involvement is asymmetric,
involving different areas to a greater or lesser extent. This type of infection may be
seen in Weimaraners with immune deficiency states.