Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

402 Small Animal Radiolo g y and Ultrasono graphy
Fig. 3-192 A 7-year-old female
Bichon Frisé with hematuria for 3
months. The survey radiograph
revealed a finely stippled calcific
density (black arrow) that is limited
to the cranial and ventral portion of
the bladder on the lateral recumbent
view. Differential diagnoses include
calcification associated with neoplasia,
cystic sand, or dystrophic calcification
of the mucosa. Diagnosis:
Calcification associated with transitional
cell carcinoma.
Fig. 3-193 An 8-year-old male
domestic short-haired cat with
chronic cystitis. There are two round
air densities in the center of the bladder
(black arrows). These represent
small air bubbles introduced by
catheterization. Because the cat is
in right lateral recumbency the air
rose to highest level in the bladder;
radiographically this is in the
center of the bladder. Diagnosis:
Intravesicular air bubbles due to urinary
catheterization.
umbilicus and the abdominal viscera are displaced cranially (Fig. 3-195). This may be extreme
enough to suggest hydroperitoneum due to the homogenous tissue density in the majority of
the abdomen; identification of displaced abdominal viscera precludes ascites as the diagnosis.
Shape Changes. Changes in bladder shape rarely are observed on survey films.
Occasionally, the external surface may be distorted due to a congenital anomaly (e.g.,