Page 546 - Atlas of Small Animal CT and MRI

536 Atlas of Small Animal CT and MRI

Figure 5.3.19 Cholelithiasis (Canine) CT
8y MC mixed breed with incidental choleliths and mineralized debris. The mineral opacities
are rounded and clumped into larger collections (arrows). The CT scan was performed
in dorsal recumbency, and the mineral debris is sedimenting to the dependent side of
the gallbladder.

(a) CT, TP

Figure 5.3.20 Gallbladder Obstruction (Feline) CT

6y FS Domestic Shorthair with anorexia and
lethargy. Images are ordered from cranial to
caudal. There are multiple dilated bile ducts
in the liver parallel to the portal branches
(a: arrows). Additional cystic masses consist-
ent with cholangiocellular adenoma are seen
as multilobular, fluid‐attenuating nodules in
the parenchyma (a: open arrow). The walls of
the bile ducts are contrast enhancing, as is the
gallbladder wall, as a result of cholangitis and
cholecystitis (b,d: arrows). There is contrast‐
(a) CT+C, TP (b) CT+C, TP
enhancing soft tissue filling the lumen of the
common bile duct at the junction of the cystic
duct and hepatic ducts (c: arrowheads). The
small gallbladder size in the face of obstruc-
tion is a result of chronic fibrosis observed
intraoperatively. The position of the obstructive
soft tissue precluded biopsy or surgical man-
agement, and differential diagnoses included
inflammatory disease and neoplasia.

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

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