Page 269 - Atlas of Small Animal CT and MRI

Sella and Parasellar Region 259

Figure 2.9.16 Pituitary Carcinoma (Feline) MR

(a) T1, SP (b) T1, TP (c) T2, TP

(d) T1+C, SP (e) T1+C, TP (f) FL, TP
14y MC Domestic Longhair with neurologic signs referable to a right‐sided cerebrothalamic lesion. Images b, c, e, and f are
representative transverse images at the level of the pituitary fossa. Images a and d are comparable images oriented in the sagittal
plane. The pituitary gland is markedly enlarged (height = 17 mm, depth = 18 mm) and extends dorsally into the hypothalamic and
thalamic regions. The mass has mixed T1 and T2 intensity compared to deep gray matter (a–c,f), suggesting intralesional hemorrhage;
is nonuniformly contrast enhancing; and has irregular margins that extend well beyond the rostral and caudal extent of the pituitary
fossa. The mass was confirmed to be a pituitary carcinoma on postmortem examination.

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