Page 607 - Atlas of Small Animal CT and MRI

Urinary Tract 597

Figure 5.8.13 Renal Carcinoma (Canine) CT
8y MC mixed‐breed dog with weight loss,
inappetence, and elevated creatinine and
blood urea nitrogen (BUN). Radiographs
(a,b) revealed a mass effect arising from the
right kidney (a: arrows). Ultrasonography
confirmed the presence of a mass and greatly
expanded right renal capsule (c,d). CT images
show an enlarged, irregular right renal mass
(e,f: arrows) with disorganized, heterogene-
ously enhancing tissue (g,h: arrows) near the
pelvis and a peripheral fluid collection (e,g:
(a) DX, VD (b) DX, LAT
asterisk). There is abundant arterial supply
to the periphery of the mass (g: open arrow).
On scintigraphic examination, the left kidney
was normal (i: arrowhead—next page), and
the right kidney had little radiopharmaceuti-
cal uptake in the cranial pole (i: open arrow-
head) and an area of photopenia
corresponding to the mass in the caudal pole
(i: arrow). A nephrectomy was performed,
and the mass was diagnosed as a renal carci-
noma effacing the kidney (j). (Figure contin-
ues on next page.)
(c) US, SP (d) US, SP

(e) CT, TP (f) CT, TP

(g) CT+C, TP (h) CT+C, TP

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