Page 71 - Atlas of Small Animal CT and MRI

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Figure 1.4.9 Osteomyelitis (Canine) CT
1y Pit Bull Terrier with an 8‐month history of
progressive right‐sided head and facial swell-
ing. Representative images are unenhanced
(a,b) and contrast enhanced (c,d) at compa-
rable anatomic levels. Images are ordered
from rostral to caudal. Marked asymmetry
of the head is evident, and the underlying
mass has both a soft tissue and an osseous
component (a,b). A peripherally contrast‐
enhancing cavitary lesion is seen within the
right temporal muscle, consistent with an
abscess and surrounding cellulitis (c). Dense
osteoproliferation is seen involving the right
and left parietal bones (a,b). An involucrum
(a) CT, TP (b) CT, TP is present toward the caudal aspect of
the proliferative bone mass (b: arrow) and
contains a focal mineral‐dense body consist-
ent with a sequestrum (d: arrow). Biopsy of
bone and associated soft tissues revealed
severe, chronic, suppurative, and necrotizing
osteomyelitis with reactive new bone forma-
tion. The hyperostotic component of this
lesion could represent underlying benign
calvarial hyperostosis that became infected.

(c) CT+C, TP (d) CT+C, TP

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