Page 113 - Atlas of Small Animal CT and MRI

Figure 1.7.8 Mandibular Salivary Gland Abscess (Canine) CT

12y MC Rottweiler with a ventral cervical
mass. Representative contrast‐enhanced
images are ordered from rostral to caudal.
There is a large predominantly fluid attenuat-
ing cavitary mass contiguous with the lateral
margin of the right mandibular salivary gland
(a: asterisk). The lateral contour of the gland is
altered, and the fluid center extends into the
glandular parenchyma (a). The mass is thick
walled, peripherally enhancing, and poorly
margined. The center consists predominantly
of fluid but also includes a small volume of
fragmented gas (b). A mixed bacterial popula-
tion was cultured from a fluid aspirate.
(a) CT+C, TP (b) CT+C, TP

Figure 1.7.9 Mandibular Salivary Adenocarcinoma (Feline) CT

8y FS Siamese with a ventral cervical mass.
Representative images are at the level of the
mandibular salivary glands. There is a large,
spherical, low‐attenuation mandibular salivary
mass in the right ventral cervical region
(a,b: large arrow). The mass contrast enhances
nonuniformly centrally and has a thin but prom-
inent peripheral rim of enhancement (b). The
normal left mandibular salivary gland is also
evident (a,b: small arrow). Biopsy confirmed
mandibular salivary adenocarcinoma.

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

Figure 1.7.10 Parotid Salivary Adenocarcinoma (Canine) CT

(a) CT, TP (b) CT+C, TP (c) CT+C, TP
13y MC Golden Retriever with a slowly enlarging mass. There is a large, irregularly margined mass arising from the right parotid salivary
gland (a,b: large arrow). The normal left parotid gland is also seen (a,b: small arrow). The cranial poles of the mandibular salivary
glands can also be seen medial to the parotid glands (a,b: arrowheads). An enlarged right mandibular lymph node is also present
(a,b: adjacent to left arrowhead). The mass nonuniformly contrast enhances revealing a central cavitary component (b). Further caudally,
a markedly enlarged right medial retropharyngeal lymph node is evident (c: arrow) adjacent to the mandibular gland (c: arrowhead).
Biopsy of the mass and lymph nodes confirmed a diagnosis of parotid salivary adenocarcinoma with regional lymph node metastasis.