Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 409
Fig. 3-202 A 1-year-old male Irish
setter with hematuria and stranguria
for 5 months. Survey radiographs
were normal. A double-contrast cystogram
revealed a cauliflower-like
mass at the bladder trigone.
Differential diagnoses include neoplasia
or granuloma. Diagnosis:
Embryonal rhabdomyosarcoma.
Fig. 3-203 A 13-year-old female
mixed breed dog with cystitis for 3
months. A and B, There is a focal
soft-tissue mass present in the apex
of the bladder (white arrows). There
is minimal to no thickening of the
bladder where it joins the borders of
the mass. The surface of the mass is
slightly irregular but not thrown into
multiple folds. Differential diagnoses
include neoplasia (benign polyp or
malignant transitional cell carcinoma),
adherent cystic blood clot, or
granuloma. Diagnosis: Polyp in the
urinary bladder.
A
B
Trauma to the bladder wall during cystography or bladder mucosa defects may result
in injection of contrast material beneath the bladder mucosa. This produces a linear accumulation
of contrast material that is fixed in position within the bladder despite changes
in the patient’s position. 462 Leakage also may occur through the bladder wall and contrast
medium will surround the bladder in the subserosal compartment. Either situation can be
observed as a result of vigorous bladder distention. It usually does not result in a serious
injury to the bladder and the contrast is absorbed gradually.