Page 535 - Clinical Small Animal Internal Medicine

48 Gastrointestinal Imaging 503

Figure 48.35 Severe megacolon in a Manx (a) (b)
VetBooks.ir radiographs of the abdomen illustrating
cat. Ventrodorsal (a) and lateral (b)
severe distension of the colon with fecal
matter. The colon narrows abruptly
towards the rectum. A small amount of
urinary bladder sediment is noted. A small
amount of subcutaneous emphysema
from a subcutaneous fluid injection is
present.

Figure 48.36 Stone in colon. Ventrodorsal (a) (a) (b)
and left lateral (b) radiographs of the abdomen
of a dog. A mineral attenuating structure (stone)
is noted summating with a gas‐filled loop of
intestine on the lateral radiograph. On the VD
radiograph, the stone is summating with the
descending colon. The small intestines are in part
fluid filled and in part gas dilated, which was
concerning for a mechanical ileus. Transverse
ultrasound image (c) illustrating a hyperechoic,
distally shadowing structure representing the
stone within the colon. No small intestinal
obstructive disease was noted. (c)

Figure 48.37 Severe sublumbar (a) (b)
lymphadenopathy secondary to prostate
neoplasia. Right lateral radiograph of the
abdomen illustrating ventral displacement
and compression of the descending colon
(arrowheads) secondary to severe
sublumbar lymph node enlargement due
to prostate neoplasia and metastases to
the lymph nodes.