A Clinical Case from the Archives : 29/03/2007

This cat presents with sudden onset bilateral pupil dilation and less sudden deterioration in vision. Its polydipsic and polyuric, also with a bit of diarrhoea too. What is the likely diagnosis?

You don’t have to be a top notch ophthalmologist to have an idea that this is a classic detached retina as part of systemic hypertension in renal failure. But you’ld be wrong! The cat has a flat retina but with these black dots in both fundi. Its blood pressure and intraocular pressure are within normal limits. So what is going on then? The retinas don’t look as if they are part of a blinding condition, which leaves us with a diagnosis of central blindness. In fact the cat had a midbrain lymphoma which explains the loss of sight.

 

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