Page 489 - Atlas of Small Animal CT and MRI

Figure 4.6.25 Histiocytic Sarcoma (Canine) Small Airways and Parenchyma 479
CT

(a) CT, TP (b) CT, TP (c) CT, TP
10y M Labrador Retriever with increased respiratory effort and cough. Representative CT images are ordered from cranial to caudal. There
are multiple well‐demarcated bronchocentric soft‐tissue attenuating pulmonary masses of variable size seen in the left cranial (a,b:
arrows) and right middle (c: arrows) lung lobes. There is also partial atelectasis of the dependent part of the right cranial and middle lung
lobes, likely associated with lateral recumbency during transport to the CT room while under anesthesia (a,c: arrowheads). Postmortem
examination confirmed a diagnosis of histiocytic sarcoma.

Figure 4.6.26 Pulmonary Lymphoma (Canine) CT

(a) DX, DV (b) CT, TP (c) CT, TP

(d) GP (e) CT+C, TP (f) CT+C, TP
9y MC Labrador Retriever with progressively worsening cough of 3 months’ duration. Survey radiographs reveal a large soft‐tissue mass
in the left caudal lung lobe, which compresses and displaces the left mainstem and caudal lobar bronchi (a). CT images b and c are
unenhanced and viewed with lung settings, and images e and f are comparable images acquired following contrast administration and
viewed using soft‐tissue settings. A soft‐tissue attenuating lobular mass involves all of the left caudal and much of the left cranial lung
lobes (b,c). The mass moderately and uniformly enhances centrally, with a thin rim of more intense enhancement peripherally (e,f).
Postmortem examination confirmed a diagnosis of B‐cell lymphoma that incorporated most of the left lung (d).