Page 540 - Atlas of Small Animal CT and MRI

530 Atlas of Small Animal CT and MRI

Figure 5.3.10 Carcinoma—Undetermined Origin (Canine) MR
5y MC Norwegian Elkhound with episodes of
collapse. On T1 contrast‐enhanced images,
there is a mildly enhancing mass (a,c: arrows)
with a cystic, hypointense center. T2‐weighted
images confirm the cystic center because of
hyperintensity within the cyst (b: arrowhead).
A biopsy of the mass was consistent with
carcinoma of undetermined origin.

(a) T1+C, DP (b) T2, DP

(c) T1+C, TP (d) T2, TP

Figure 5.3.11 Feline Biliary Adenocarcinoma (Feline) CT

(a) US, SP (b) CT, TP (c) CT+C, TP
14y MC Domestic Shorthair with a hepatic mass discovered on ultrasound exam. On ultrasound imaging, the mass is distorting the right
liver with mildly heterogeneous architecture (a). The mass is poorly encapsulated on CT images, with relative hypoattenuation on unen-
hanced (b) and contrast‐enhanced (c) images. There is mild, heterogeneous contrast enhancement (c: arrowheads). Surgical excision and
biopsy confirmed a diagnosis of biliary adenocarcinoma involving the right medial and lateral liver lobes.

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