Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

436 Small Animal Radiolo g y and Ultrasono graphy
Fig. 3-244 Longitudinal (A and B)
and transverse (C and D) sonograms
of the caudal abdomen of a 4-yearold
spayed female Samoyed with a
history of chronic urinary incontinence
and acute onset of vomiting
and icterus. There is a heteroechoic
mass located caudal to the urinary
bladder (A and B) and on the left lateral
aspect of the bladder (C and D).
This represents a uterine stump.
Diagnosis: Stump pyometra.
A
B
C
D
Fig. 3-245 Longitudinal (A) and
transverse (B to D) sonograms of the
posterior abdomen of a 5-year-old
spayed female mixed breed dog with
a history of recurrent estrus and a
purulent vaginal discharge, which
persisted despite a second ovariohysterectomy
with removal of residual
ovarian tissue. There is a heteroechoic
elongated somewhat oval
mass (arrows) evident caudal and to
the left of the urinary bladder. In the
region of the cervix is a centrally
located hyperechoic region. This
represents a uterine stump.
Diagnosis: Stump pyometra.
A
B
C
D
the cat heart motion is visible at 17 days (Figs. 3-247 and 3-248). Mineralization of the
mandible, ribs, spine, and skull is sonographically detectable at approximately 30 to 33 days
gestational age. These are evident as hyperechoic symmetric structures. By 37 days cardiac
chambers can be identified. The lung and liver have equal echo intensity at 40 days, but the
echo intensity of the lung increases by day 43 (Figs. 3-249 and 3-250). By day 46 long bones
and facial features are evident. Intestinal motility may be observed by day 58 to 63. 826-842