Several small radio-opaque objects, consistent with uroliths, are present in both kidneys, and there is at least one more that could be located in a ureter.

Othogonal radiography may help to better localise the possible ureterolith. Urinary tract ultrasound would help to demonstrate whether the liths are obstructive. Safe contrast techniques also exist. Renoliths are often clinically silent, but intervention is frequently required when a ureterolith is present.

The amount of investigation undertaken in any patient of course depends on the individual circumstances, including owner motivation, finances, and most importantly the clinical status of the cat. Renal imaging tells you nothing about renal function. However, a cat presenting unwell, with newly diagnosed azotaemia, may benefit from imaging as this is the only way to detect potentially reversible elements of kidney disease such as uretal obstruction, or pyelonephritis.

How did you get on?

This question and answer is from the tutor on the upcoming Online Mini Series Course ‘Feline Medicine – The Geriatric Cat’. Register now for very practical help and essential tips for the best outcomes with your geriatric cats.