Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 377
A
B
Fig. 3-150 An 11-year-old neutered female domestic short-haired cat with polyuria and polydipsia
for 6 weeks and palpably enlarged kidneys. Survey radiographs revealed that both kidneys were
enlarged and had irregular borders. A, The early stages of the excretory urogram reveal multiple foci
of relative radiolucency separated by septa that are contrast enhanced. B, The later stages show the
multiple cysts more clearly and a distorted renal sinus. Differential diagnoses include polycystic kidney
disease, bilateral multifocal renal tumors (metastatic or primary), lymphoma, or FIP. Diagnosis:
Polycystic kidney disease.
Fig. 3-151 A 1-year-old female Miniature Schnauzer with vomiting,
polydipsia, and polyuria. The kidneys were not identifiable on survey
radiographs. The excretory urogram revealed that the left kidney was
slightly smaller than normal and the right kidney was markedly
smaller. The urinary collecting systems were normal. Differential
diagnoses include congenital renal dysplasia, chronic pyelonephritis,
or CIN. Diagnosis: Congenital renal dysplasia.
Canine
CIN AND HYPOPLASIA. The appearance of the EU is similar in both the dog and the
cat. 476
RENAL DYSPLASIA. Renal opacification during the nephrogram phase is usually less than
normal. The renal pelvis and pelvic recesses may not be visualized, but when seen, they may
be normal, small, or asymmetrically enlarged and distorted (Fig. 3-151).