Page 609 - Atlas of Small Animal CT and MRI

Figure 5.8.15 Ureteral Transitional Cell Carcinoma (Canine) CT

(a) US, SP (b) DX, VD (c) CT+C, MIP, DP

(d) CT+C, TP (e) GP (f) GP
8y MC English Bulldog with respiratory distress and incidentally discovered left ureteral obstruction on ultrasound examination (a).
A nephropyelogram was performed, demonstrating the dilated left renal pelvis and proximal ureter (b: arrowheads) without visualiza-
tion of the distal ureter. Urine enters the bladder, suggesting a partial obstruction. On CT images, the dilated left renal pelvis and
proximal ureter are again seen (c: arrowheads). There is a soft‐tissue mass enlarging the left ureter distal to the ureteral dilation (c,d:
arrows), and the contrast‐enhanced urine traces a complex, tortuous path through this region. The distal ureter is a more normal
diameter (c: open arrow). The bladder is visible (d: asterisk) ventral to the ureteral mass (d: arrow) on transverse images. A nephrec-
tomy was performed, and transitional carcinoma of the ureter was diagnosed.

Figure 5.8.16 Bladder Transitional Cell Carcinoma (Canine) CT

(a) CT, TP (b) CT+C, TP (c) CT+C, TP
10y MC German Shepherd Dog mix with lumbosacral intervertebral disc herniation and incidental bladder mass. The mass (a: arrow) is
slightly hyperattenuating to urine (a: asterisk) on the unenhanced images, with small regions of mineralization. The mass becomes appar-
ent as a filling defect (b,c: arrow) within the contrast‐enhanced urine during the venous and late phase images. The mass was surgically
excised and diagnosed as a focal papillary transitional cell carcinoma.
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