Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

428 Small Animal Radiolo g y and Ultrasono graphy
Fig. 3-231 A 3-year-old female
Rhodesian Ridgeback with inability
to accept a male at breeding despite
being in heat. Contrast vaginographic
findings include nondistendible
area (arrow) between the
vestibule and the vagina. Survey
radiographic findings were normal.
Diagnosis: Vaginal stricture.
Fig. 3-232 A 14-year-old female
Collie with polyuria and polydipsia
for 3 months and a palpably enlarged
spleen. There is a soft tissue–dense
mass (black arrows) caudal to the left
kidney. Differential diagnoses
include enlarged left ovary, intestinal
mass, or mesenteric lymph node.
Diagnosis: Left ovarian papillary
adenocarcinoma.
ABNORMAL FINDINGS
O VA R I E S
Although normally not radiographically visible, the ovaries, which are located just caudal to
the kidneys, may enlarge. Cysts and neoplasia are the more common causes of enlargement,
but hemorrhage must also be considered as a cause of ovarian enlargement (Fig. 3-232). The
position of the adjacent kidney is an important clue to the presence of an ovarian mass,
because the kidney may be cranially and laterally displaced. Malignant ovarian tumors com-