Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 391
Fig. 3-173 Longitudinal (A, B, and
D) and transverse (C) sonograms of
the left kidney of a 12-year-old
Bichon Frisé with a history of urinary
tract infection of 3 months
duration. There are hyperechoic
regions within the renal pelvis with
shadowing. This is indicative of renal
mineralization. Diagnosis: Renal
mineralization.
A
B
C
D
A
B
Fig. 3-174 Longitudinal (A and B)
and transverse (C and D) sonograms
of the left kidney of a 4-month-old
female Great Dane with a history of
fever, anorexia, depression, and
reluctance to walk of 1 month duration.
The kidney is hyperechoic, and
there is a hyperechoic band at the
junction of the inner and outer renal
medulla. This is indicative of renal
tubular mineralization, acute tubular
necrosis, pyogranulomatous vasculitis,
CIN, and hypercalcemia. A
somewhat similar pattern has been
observed in ethylene glycol toxicity.
Diagnosis: Acute tubular necrosis
and renal mineralization associated
with hypertrophic osteodystrophy.
C
D
ent, increasing the likelihood of ureteral calculi and making any mineralized density in the
sublumbar or retroperitoneal area more suspicious. Ureteral calculi may be located anywhere
from the renal pelvis to the trigone of the bladder. There is a normal density, the
end-on view of the deep circumflex iliac vessels, that can mimic the appearance of a
ureterolith at the level of the fifth and sixth lumbar vertebrae. 418 Retroperitoneal masses,
which can be presumed to displace or encompass the ureters, may be seen. These produce
a soft-tissue swelling in the sublumbar or retroperitoneal space. The normal thin line of