I know, it’s kind of a funny sounding word. But if you have a diabetic cat that your vet just can’t seem to stabilise, it’s definitely not a laughing matter. Acromegaly has recently been found to affect up to a quarter of diabetic cats in the UK, many more than previously thought, so it’s worth talking about. It’s also probably underdiagnosed, which means your vet may not think to look for it, so if you’ve been told that your cat’s diabetes is particularly difficult to control, read on!
What is acromegaly?
The name acromegaly actually comes from human medicine, because in people, it causes abnormally large hands, feet and facial features. Although you can see similar signs in cats (a broad face with a protruding lower jaw and larger than normal feet), it’s much less common so another term you may see used is ‘hypersomatotropism’ which literally means an excessive production of growth hormone. It’s caused by a benign (ie, unlikely to spread to other tissues) tumour on the tiny pituitary gland, situated at the base of the brain. The pituitary gland secretes lots of useful hormones that control all sorts of functions in the body, but in this case it’s growth hormone produced in huge quantities by the growing tumour that causes the problem. The majority of affected cats are males unlike in dogs, where acromegaly is usually caused by changes in the mammary gland and is therefore seen almost exclusively in females that haven’t been spayed.
What’s the connection between acromegaly and diabetes?
Too much growth hormone floating around the body decreases its sensitivity to insulin, which is the hormone that controls sugar metabolism. If the body doesn’t respond very well to insulin, the blood sugar gets too high and the cat becomes diabetic…….