Page 622 - Atlas of Small Animal CT and MRI

Figure 5.9.8 Penile Hemorrhage (Canine) CT

(a) CT+C, TP (b) CT+C, TP

(c) CT+C, TP (d) CT+C, TP (e) CT+C, TP
4y MC Doberman Pinscher with a mass extending from rectum to penis. Images are ordered from cranial to caudal. A catheter is present
in the urethra (a–e: solid arrows), extending to the urinary bladder (a: asterisk). There is a large tubular soft‐tissue and fluid attenuating
mass parallel to the urethra that extends from the pelvic canal to the penis (b–e: open arrows). The mass does not contrast enhance cen­
trally and has a rim of peripheral enhancement. Fine‐needle aspirates revealed blood and fat cells, and the mass was presumed to be a
hematoma. Coagulopathy was not identified; however, there was a history of trauma, and the mass began to reduce in size after 48 hours.

Figure 5.9.9 Prostatic Carcinoma (Canine) MR

13y MC Leonberger with stranguria and pol­
lakiuria. The prostate gland is enlarged (a–c:
arrows) with a large cavitary region in the
left lobe (b: solid arrowhead) that is hyper­
intense on T2 images and hypointense on
T1 images. The urethra (b: open arrowhead)
appears to communicate with this cavity on
unenhanced images and has an irregularly
shaped lumen (a–c). There is mineralization
of the dorsal parenchyma (b: small arrow).
The prostatic mass shows heterogeneous
(a) T1, TP (b) T2, TP
contrast enhancement (c: arrow). Contrast‐
enhanced urine fills the urethra (d: open
arrowhead) and the cavity (d: solid arrow­
head), confirming the urethral communi­
cation. The mass was diagnosed as a
transitional cell carcinoma.

(c) T1+C, TP (d) SPGR+C, DP
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