Abstract
In a ten-year-old cat with hyperthyroidism, findings obtained from urine an blood tests showed that it was suffering from fanconisyndrome-like disease. Fanconi syndrome features proximal renal tubular disorder. The results of these tests revealed glucosuria without hyperglycemia, increased excretion rates of urinary fractions of phosphorus and potassium with decreased concentrations of serum phosphorus and potassium. Also detected was increased urinary excretion of protein, the main of which was proved to be the loss of α1 and α2 globulin. Then the cat was treated with anti-thyroid agent, thiamazole. Body weight, urinary NAG index, excretion of potassium, and urinary protein changed as the concentrations of serum T4 fraction changed. Now the cat is in good condition with administration of thiamazole.
