Page 187 - Feline diagnostic imaging

(a) (b) (c)

(f)

(d)

(e)

Figure 11.16 (a,b) Lateral (a) and ventrodorsal (b) thoracic images of a cat presented for respiratory distress and neurologic signs.
A large cranial mediastinal mass is present, causing dorsal displacement of the trachea, caudal displacement of the carina and heart,
and border effacement of the cranial cardiac margin. (c–e) Transverse (c), dorsal reconstruction (d), and sagittal reconstruction
(e) CT images taken post contrast. A large, rim-enhancing mass takes up the entire cranial mediastinum, displacing the trachea (T)
and heart to the right. The trachea is displaced dorsally. A small amount of pleural effusion (fl) is visualized best on the dorsal
reconstruction, in the caudal thorax. (f) Longitudinal US image of the cranial mediastinum of the same cat. A complex, cystic mass is
present. The mass was removed surgically, and diagnosed as a thymic cyst.

Figure 11.17 Transverse CT image (postcontrast) through the
midthorax. A moderate volume of pleural effusion is noted in
the right pleural cavity (pl fl). Part of the adjacent lung lobe is
atelectic, with visible air bronchograms (arrow). Figure 11.18 Transverse CT image (postcontrast)
demonstrating bilateral pneumothorax. The radiolucent gas is
noted in the dorsal, nondependent pleural space. The lung lobes
are partially atelectic, and do not expand to the chest wall.