Page 503 - Atlas of Small Animal CT and MRI

Body Wall, Retroperitoneum, and Peritoneal Cavity 493

Figure 5.1.1 Retroperitoneal Hemorrhage (Canine) CT

(a) CT, TP (b) CT, SP (c) CT+C, TP
11y MC Maltese with a T12–13 fracture/luxation sustained from an attack by a larger dog. A fracture of the left pedicle and body of T12
is shown on a transverse image (a: open arrow). There is ill‐defined fluid attenuation within the retroperitoneal space due to hemorrhage
dorsal to the descending aorta (b,c: arrows).

Figure 5.1.2 Spontaneous Pelvic Hematoma (Canine) CT
3y FS Boxer with history of straining to
urinate and defecate. On unenhanced images,
there is a heterogeneous soft‐tissue attenuat­
ing (45 HU) mass in the left pelvic region
(a: white arrows) causing rightward deviation
of the colon (a: black arrow). The mass peri­
pherally enhances following intravenous con­
trast administration (c: white arrows). A urinary
catheter is seen within the bladder lumen
(a,c: asterisk). The dorsal plane image shows
the mass occupying the majority of the pelvic
(a) CT, TP (b) CT, DP
canal (b: arrows). More cranially, hemorrhage
is present as hypoattenuating fluid in the
left retroperitoneal space (d: open arrow).
The mass was not neoplastic; however, it
contained vascular structures that may have
represented a preexisting vascular anomaly.

(c) CT+C, TP (d) CT+C, TP

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