Abstract
A 17-year-old male cat presented with episodes of anorexia and ataxia. Blood examination showed elevated alkaline phosphatase, creatine kinase, and severe hypokalemia. Abdominal ultrasonography revealed a left renal mass and bilateral adrenal gland enlargement. Plasma aldosterone concentration and plasma renin activity were respectively elevated. From these findings this case was suspected as a secondary hyperaldosteronism, probably due to a left renal mass. Treatment, ACE inhibitor, and spironolactone improved hypokalemia and clinical signs.
