Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

380 Small Animal Radiolo g y and Ultrasono graphy
Fig. 3-155 A 7-year-old male mixed breed dog with hematuria
for 1 month. Survey radiographs revealed an enlarged,
irregularly shaped left kidney (see Fig. 3-136). The nephrogram
phase of the excretory urogram revealed wispy, irregular,
opacified tubular structures (black arrows) within the
left renal mass consistent, with neovascularity associated
with neoplasia. The right kidney had a flattened area in the
cranial lateral margin suggesting a prior renal infarction.
Differential diagnoses for the left renal mass included various
forms of renal neoplasia. Diagnosis: Nephroblastoma.
Fig. 3-156 A 10-year-old male Beagle with polydipsia and
polyuria. There is a marked global, smooth enlargement of
the right kidney with dilation of the renal pelvis, compression
of the diverticula (especially those draining the caudal
pole), and obstruction of the ureter near the caudal pole.
The left kidney and ureter are normal. Differential diagnoses
include neoplasia, either primary or metastatic, with
ureteral involvement or granulomatous disease. Diagnosis:
Renal carcinoma with ureteral strangulation.