Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Chapter Three The Abd omen 459
Fig. 3-282 Longitudinal sonograms
of the cranial abdomen of a 15-yearold
spayed female Dachshund with
acute rear-limb paralysis that
occurred secondary to a fall from the
owner’s arms. The dog was potbellied
and had a long-standing history
of polyuria and polydipsia.
There is an oval heteroechoic mass
noted (arrows) compressing or
invading the caudal vena cava. The
aorta is evident deep to this mass.
This represents an adrenal tumor.
Diagnosis: Adrenal adenoma.
A
B
Fig. 3-283 Longitudinal (A and B)
and transverse (C and D) sonograms
of the left adrenal gland of a 12-yearold
spayed female mixed breed dog
with a history of panting and gagging.
There was a palpable mass in
the laryngeal region. The adrenal
gland is enlarged and abnormally
shaped (arrows). This may be secondary
to adrenal tumor of hyperplasia.
The cervical mass was
determined to be a thyroid adenoma.
Diagnosis: Adrenal adenocarcinoma.
C
D
A B N O R M A L I T I E S O F T H E A B D O M I N A L WA L L
Along with the various changes that are associated with the estrous cycle and pregnancy in
the cat, changes in the mammary glands must not be forgotten. There is a phenomenon
referred to as the feline mammary hypertrophy–fibroadenoma complex that can appear as
prominent mammary enlargement. 928 This must be differentiated from other abdominal
wall disorders, mastitis and, although unlikely, diffuse neoplasia.