Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 395
Fig. 3-181 A 9-year-old female Miniature Pinscher with
lethargy for 2 weeks, having an arched back, anorexia, and diarrhea
for 2 days. Survey radiographs revealed a large calculus in
the right renal pelvis and the suggestion of a calculus in the left
ureter. The excretory urogram revealed a severely dilated right
renal sinus with a central filling defect that is shaped similarly to
the calculus (black arrow). The ureter distal to the pelvis is normal.
The left kidney revealed a dilated renal pelvis and proximal
ureter (long white arrows) as well as diverticula. The ureteral
dilation (small white arrows) ends at the level of the ureteral calculus
(open white arrow). Diagnosis: Right renal calculus and
left ureteral calculus with resultant proximal hydroureter and
hydronephrosis (see Fig. 3-179).
Fig. 3-182 A 14-year-old female
mixed breed dog with chronic hematuria.
There is mild global enlargement
of the left kidney and the
collecting system of the kidney and
the entire length of the ureter (white
arrows). The right kidney is quite
small with no discernible collecting
structures. There is a large filling
defect in the trigone region of the
bladder (black arrow). Differential
diagnoses for the right kidney
include congenital hypoplasia or
chronic atrophic pyelonephritis,
those for the left kidney include
obstructive uropathy or acute
pyelonephritis and ureteritis, and
those for the bladder include neoplasia
or granuloma. Diagnosis:
Transitional cell carcinoma of the
bladder with obstruction of the left
ureter and chronic atrophic
pyelonephritis of the right kidney.