This nine year old cat presented with lethargy, innappetance and was weak and tachycardic on examination. Ophthalmic examination showed these lesions in his retina. What other tests would you perform and what diagnosis might be made?
We ran a haematology and biochemistry panel and found a potassium of 2.mmol/l (reference range 3.7-4.5) and abdominal radiography which showed a mass close to the left kidney. The retinal lesions suggested hypertension and indeed the cat has a mean blood pressure of well above 180mmHg. This is secondary to hyperaldosteronism associated with an adrenal mass. Surgery is planned soon.