Hyperaldosteronism in a cat with metastasised adrenocortical tumour

In a 12-year-old male shorthaired cat with attacks of hypokalaemic muscular weakness in spite of oral potassium supplementation, highly elevated plasm a aldosterone concentrations in combination with low plasma renin activity pointed to primary hyperaldosteronism, Ultrasonography and computed tomogra phy revealed a large left-sided adrenal tumour growing into the phrenicoabd ominal vein and the caudal vena cava, The tumour and its intravascular exte nsion were surgically removed, but the subsequent stenosis of the caudal ve na cava caused congestion and renal failure. At autopsy pulmonary micrometa stases of the aldosteronoma were found.