Page 227 - Atlas of Small Animal CT and MRI

Infectious Inflammatory Disorders 217

Figure 2.7.12 Mycotic Granulomatous Meningoencephalitis (Canine) MR

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

(d) T1+C, TP (e) T1+C, TP (f) GP, TP
2y FS German Shepherd Dog with abnormal ambulation and reduced mentation. There is a T1 hypointense and T2 and FLAIR hyperintense
mass in the left thalamus that creates a moderate rightward midline shift (a–c: arrow). There is pronounced T2 and FLAIR hyperintensity
involving the left hemispheric corona radiata, consistent with widespread edema (b,c: arrowheads). Additional, more subtle T2
hyperintense foci were identified, distributed randomly throughout the brain parenchyma (not shown). Following contrast administration,
multiple ill‐defined regions of contrast enhancement are present, distributed throughout the brain parenchyma, with the most prominent
lesions seen in the thalamus bilaterally and surrounding the left lateral ventricle (d,e). Postmortem examination confirmed multisystemic
granulomatous inflammatory disease caused by Paecilomyces sp. The thalamic mass detected on MR images corresponded to a cavitating
granuloma seen on gross examination (f: arrow).

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