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Gastrointestinal Tract 549

Figure 5.4.15 Adenocarcinoma—Colon (Feline) CT
15y FS Siamese with a 2‐week history of vomit-
ing, hematochezia, and straining to defecate.
Unenhanced (a,b) and comparable contrast-
enhanced (c,d) images are ordered from caudal
to cranial. On unenhanced images, there is an
eccentric mass arising from the wall of the colon.
The central region of the mass is mineralized (d:
arrowhead). The colonic lumen is compressed,
indicating partial obstruction by the mass.
The mass is heterogeneously and peripherally
contrast enhancing (d: arrows). The cytologic
(a) CT, TP (b) CT, TP
diagnosis was adenocarcinoma.

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

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