Page 412 - Atlas of Small Animal CT and MRI

Figure 4.2.3 Pleural Effusion with Lung Lobe Torsion (Canine) CT

(a) DX, VD (b) CT, TP (c) CT, TP
9y MC Bernese Mountain Dog with hemothorax resulting from heparin administration for an unrelated medical problem. The ventrodor-
sal radiograph reveals pleural effusion and an ill‐defined mass in the region of the right middle lung lobe (a). Images b and c are the
same images optimized for viewing aerated lung and soft tissues, respectively. There is moderate pleural effusion distributed in the
dependent part of the pleural space (b,c: asterisk) and an enlarged, malpositioned right middle lung lobe with CT features consistent
with lobar torsion (c: arrows). A right middle lung lobe torsion was confirmed surgically.

Figure 4.2.4 Chronic Chylous Pleural Effusion (Feline) CT

(a) DX, LAT (b) CT+C, DP (c) CT+C, DP

(d) CT+C, TP (e) CT+C, TP (f) CT+C, TP
8y FS Domestic Shorthair with 1‐month history of rapidly progressive increased respiratory effort. A lateral radiograph (a) reveals a large
volume of pleural effusion and rounding of the lung margins consistent with chronic pleural thickening and reduced compliance. CT
images also document the pleural effusion and restricted pulmonary inflation (b,d–f). A CT image optimized for viewing aerated lung
reveals multiple focal regions of atelectasis (d: arrows). Contrast‐enhanced images also highlight uniform visceral and parietal pleural
thickening and enhancement, all of which are consistent with pleuritis (c,e,f: arrows). Analysis of fluid from thoracocentesis confirmed
chylous effusion. Clinical diagnosis was chronic chylothorax with restrictive pleuritis.