Page 198 - Atlas of Small Animal CT and MRI

188 Atlas of Small Animal CT and MRI

Figure 2.5.3 Presumptive Thiamine Deficiency (Feline) MR

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

(d) T2, TP (e) T1, TP (f) T1+C, TP

(g) T2, DP (h) T2, DP
14y MC Domestic Shorthair with 2‐day history of inappetence, vomiting, and ataxia. Neurologic examination revealed multifocal
neurological deficits involving the cerebellum, brainstem, and cerebrum. There are focal regions of T2 and FLAIR hyperintensity involving
the lateral geniculate nuclei (a,g: arrowheads), the caudal colliculi (b,d,h: arrowheads), and vestibular nuclei (c: arrowheads). Other
thalamic nuclei were similarly affected (not shown). There is also ill‐defined T2 and FLAIR hyperintensity of the axial regions of the
parietal and occipital cortex (a,b,d: arrow), which enhance following contrast administration (f: arrow). These MR features are
characteristic of multifocal polioencephalopathy due to thiamine deficiency. Further questioning of the owner revealed the cat had been
fed an almost exclusively meat diet. Clinical signs resolved with dietary change and thiamine supplementation.

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