Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 375
A
B
Fig. 3-147 A 1-year-old female domestic short-haired cat with a palpably enlarged left kidney
detected on routine examination prior to ovariohysterectomy. A, The 15-minute ventrodorsal view
of the excretory urogram revealed minimal contrast enhancement to the structure except for a few
linear radiodensities that radiated peripherally from the pelvis (white arrows). These represent renal
blood vessels that were stretched. B, The 6-hour ventrodorsal view revealed a markedly opacified kidney.
This represented the delayed pyelogram finding of hydronephrosis. Diagnosis: Hydronephrosis
of the left kidney.
MULTIPLE MYELOMA. Performing an EU in human patients with multiple myeloma is not
recommended because of the possibility of contrast media–induced renal failure. This reaction
should be considered in animals as well. If an EU is performed, the nephrogram phase will
show smoothly enlarged renal outlines with or without patchy areas of decreased density. The
pyelogram phase will show normally shaped collecting structures that may have poor density.
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Bilateral, Large, Irregular
Feline and Canine. The findings for diseases in this category (lymphosarcoma, FIP,
bilateral renal tumors, acute bilateral pyelonephritis, amyloidosis, and polycystic renal disease)
are the same as described under Bilateral, Large, Regular, except that the renal outlines
are irregular.