Page 30 - Atlas of Small Animal CT and MRI

20 Atlas of Small Animal CT and MRI

Figure 1.1.20 Nasal Transitional Cell Carcinoma (Canine) CT

7y MC Golden Retriever cross with a 2‐month
history of right‐sided epistaxis. A large soft‐
tissue mass fills the right nasal cavity and
extends across midline (a). The right ectoturbi-
nates are obliterated by the mass, and there is
right maxillary and nasal septum destruction
(a). Regional destruction of the right side of
the cribriform plate is seen (b), and the right
frontal sinus is filled with fluid‐attenuating
material. The nasal mass enhances heteroge-
neously and extends through the breach in the
right maxillary bone (c: arrow). There is promi-
nent meningeal enhancement adjacent to the
right cribriform osteolytic region (d: large
(a) CT, TP (b) CT, TP
arrow) as well as an associated mild midline
shift of the interolfactory longitudinal fissure
(d: small arrow). Material within the right
frontal sinus does not contrast enhance,
confirming fluid and exudate entrapment
from sinus obstruction. Nasal biopsy revealed
transitional cell carcinoma.

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

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